Click Start Test above to launch a full-length Praxis Elementary Education: Science (5005) practice test weighted like the real exam, or drill a single content category — Earth Science, Life Science, or Physical Science. Every question includes a worked explanation so you learn the reasoning, not just the answer.
The Praxis Elementary Education: Science (5005) is a teacher licensure subtest administered by ETS. It is the science portion of the Elementary Education: Multiple Subjects battery and measures the science content a beginning elementary teacher is expected to know.
[1] The test has 55 selected-response questions with a 60-minute time limit, and an on-screen scientific calculator is provided. These free practice questions mirror the three content categories in ETS’s published outline.[2]
Praxis 5005 is the science subtest of the broader Elementary Education: Multiple Subjects (5001) battery — explore all our Praxis practice tests to prep across the whole family.
Career Employer Praxis 5005 Student Data
Updated daily
Career Employer Praxis 5005 practice-test data · through Oct 7, 2026 · 85+ students
Earth Science is the most-missed Praxis 5005 section on Career Employer: students get 78% of its practice questions right on the first try.[7]
What 85+ Praxis 5005 students on Career Employer got wrong
First-try accuracy by exam section, hardest first[7]
- Earth Science33% of exam78%n=1,698
- Life Science33% of exam85%n=1,531
- Physical Science35% of exam85%n=1,597
Earth Science is both the most-missed Praxis 5005 section (78% correct on the first try) and the section where students lose the most points — it’s 33% of the exam. Start here.[7]
See Career Employer’s full Praxis 5005 student data ↓Our data & methodology
Source: Career Employer Praxis 5005 practice-test data, first attempt at each question only, Aug 29, 2026 – Oct 7, 2026. Our practice questions written to the official outline, not the official exam; self-selected sample; a student is one browser.
Praxis 5005 at a Glance
| Detail | Praxis 5005 |
|---|---|
| Certifying Body | ETS (Educational Testing Service) |
| Total Questions | 55 (selected-response) |
| Time Limit | 60 minutes |
| Calculator | On-screen scientific calculator provided |
| Score Range | 100–200 (scaled) |
| Passing Score | Set by each state (not by ETS) |
| Exam Fee | $64 (single subtest) |
| Content Categories | 3 (Earth Science; Life Science; Physical Science) |
What Is on the Praxis 5005?
ETS organizes the Praxis 5005 into three content categories: I. Earth Science, II. Life Science, and III. Physical Science. Scientific inquiry, the engineering-design and data-analysis practices, and the nature of science are woven into each category rather than tested as a separate section.[2]
The three categories are weighted roughly evenly — about 33% each. Our full practice test is weighted to match the outline:
Practice Questions by Category
Use Start Test for a full weighted Praxis 5005 simulation, or open the hub and pick a single content category to drill your weak spot. After each full exam, your results show a per-category breakdown so you know exactly where to focus — many candidates need the most reps in the physical-science topics (forces, energy, and matter) and the Earth-and-space material.
What Are the Requirements to Take the Praxis 5005?
To take the Praxis 5005, ETS sets no formal prerequisites to register for the test itself — anyone can sign up and pay the fee to take it.
[4] Eligibility to use the score, however, is governed by your state or teacher-preparation program. Each state decides whether the 5005 (often taken within the 5001 battery) is required for elementary licensure and which passing score it accepts.
[5]Confirm your state’s specific requirement before you register so your attempt counts toward licensure.
How Do You Register for the Praxis 5005?
You register for the Praxis 5005 directly through ETS at praxis.ets.org by creating or signing into an ETS account, selecting the Elementary Education: Science (5005) subtest, choosing a test window and location, and paying the registration fee.
[4] Most candidates test at a Prometric-style center or online with remote proctoring where offered, and an on-screen scientific calculator is built into the test so you bring nothing extra.
The single-subtest fee is $64, and if you need to reschedule you must do so at least three days before your test date (a reschedule fee applies). Fees can change, so verify the current price and available dates on the ETS Praxis site before you register.[6]
What Is the Passing Score for the Praxis 5005?
The Praxis 5005 passing score is set by each state or agency, not by ETS, on the scaled 100–200 range.[5] Because each state sets its own qualifying score, the score you need depends on where you seek licensure.
The subtest is scored on your overall performance across the scored questions, with raw scores converted to that scaled score.[5] Using a scaled score keeps the standard consistent as question difficulty varies between forms; a handful of unscored pretest questions may also appear and do not count toward your score.
Your score report shows your scaled score and the passing score for the state you selected, so you know immediately whether you met that state’s requirement.[5]
How Hard Is the Praxis 5005?
The Praxis 5005 is broad but introductory — 55 questions span geology, weather, astronomy, cells, ecosystems, heredity, matter, forces, energy, and basic chemistry in just 60 minutes. ETS does not publish a single official first-time pass rate for the 5005.
The difficulty comes from the breadth of elementary science content and the pace rather than from advanced material: you have only about 65 seconds per question, and items range from quick recall to applying scientific reasoning to a scenario.
The takeaway: refresh the science topics you last studied years ago — the rock cycle, the water cycle, ecosystems and food webs, states of matter, and forces and energy — and practice reading scientific scenarios so nothing on test day is unfamiliar.
On Career Employer, Praxis 5005 students miss Earth Science most (78% right on the first try)[7] — see the Praxis 5005 student data above.
What to Expect on Exam Day
The Praxis 5005 is a proctored, computer-delivered test.[4] Arrive at least 30 minutes early to check in and bring a valid, unexpired government-issued photo ID whose name matches your ETS registration. You’ll store phones and personal items; no notes or personal calculators are allowed.
After a short tutorial, you have 60 minutes to answer 55 selected-response questions using the built-in on-screen scientific calculator when needed. Because items mix quick recall with applied scientific reasoning, pace yourself and flag-and-return rather than over-investing in any one question.
ETS processes your results and posts an official score report to your account, showing your scaled score against the state passing score you selected.
How to Use This Praxis 5005 Practice Test
- Recreate exam conditions. Take the full test timed, with no notes.
- Diagnose, then drill. Use a full simulation to find weak categories, then drill them.
- Refresh the basics. Earth cycles, ecosystems, and the states and changes of matter move scores the most.
- Practice scientific reasoning. Many items ask you to interpret an experiment, a diagram, or data, not just recall a fact.
- Learn the why. Read every explanation — understanding the concept beats memorizing.
Why Pass the Praxis 5005?
For most states, passing the Praxis 5005 is a required step toward an elementary teaching license — it signals to state boards and districts that you have the science content mastery to teach elementary students.[1][5] These free Praxis 5005 practice tests are the most efficient way to get exam-ready.
Conclusion
Passing the Praxis 5005 comes down to refreshing elementary science broadly across Earth, life, and physical science and practicing under time pressure rather than cramming any single topic. Use this free Praxis 5005 practice test to find your weak categories, drill them to mastery, and build the pacing you need. For more, explore our full Praxis practice test library. On Career Employer, Praxis 5005 students lose the most points on Earth Science (78% correct on the first try), so start your drilling there.[7]
Praxis 5005 Practice Test FAQ
Praxis Elementary Education: Science (5005) is a teacher licensure subtest administered by ETS. It is the science portion of the Elementary Education: Multiple Subjects battery and measures the science content knowledge a beginning elementary teacher is expected to have across Earth science, life science, and physical science.
The Praxis 5005 has 55 selected-response questions and a 60-minute time limit. An on-screen scientific calculator is provided within the test for the questions that need one.
ETS organizes the Praxis 5005 into three content categories, each weighted at about 33 percent: I. Earth Science (~18 questions), II. Life Science (~18 questions), and III. Physical Science (~19 questions). Scientific inquiry and engineering-style practices are embedded within each category rather than tested separately.
The Praxis 5005 passing score is set by each state or licensing agency, not by ETS, on the scaled 100-to-200 range. Confirm the exact qualifying score for the state where you seek licensure using the ETS state-requirements tool.
Yes. An on-screen scientific calculator is built into the test and available throughout, so you do not bring a handheld calculator. It is helpful only on some quantitative items, so decide how to solve each question first.
ETS sets no formal prerequisites to register for the test itself. Eligibility to use the score for licensure is determined by your state or teacher-preparation program, so check whether your state requires the 5005 (often taken as part of the 5001 battery) and which passing score it accepts.
The Praxis 5005 registration fee is $64 for the single subtest. Fees can change, so verify the current price on the ETS Praxis website before you register.
No. The 5005 is just the Science subtest. The 5001 (Elementary Education: Multiple Subjects) is the full battery of four subtests — Reading and Language Arts (5002), Mathematics (5003), Social Studies (5004), and Science (5005) — which can be taken together or individually.
ETS requires you to wait at least 28 days before scheduling a new appointment for the same test, even if your previous scores were canceled. Each attempt requires paying the registration fee again, so build a study plan before rescheduling.
Career Employer Praxis 5005 practice-test data, through Oct 7, 2026 · 85+ students
| Metric | Value | n | Students | Source | Data through |
|---|---|---|---|---|---|
| First-try accuracy: Earth Science (32.7% of the exam; costs 7.1 of every 100 exam points) | 78.4% | 1,698 answers | 85 | current question set | Oct 7, 2026 |
| First-try accuracy: Life Science (32.7% of the exam; costs 5 of every 100 exam points) | 84.6% | 1,531 answers | 79 | current question set | Oct 7, 2026 |
| First-try accuracy: Physical Science (34.5% of the exam; costs 5.2 of every 100 exam points) | 85% | 1,597 answers | 84 | current question set | Oct 7, 2026 |
First attempt at each question only; repeats, answers after revealing the explanation, bots and staff excluded. Aug 29, 2026 – Oct 7, 2026. Our practice questions written to the official outline, not the official exam; self-selected sample; a student is one browser. Free to reuse under CC BY 4.0 — cite “Career Employer practice-test data, careeremployer.com/data”.
Want the short version before you start the question bank? Our free Praxis 5005 cheat sheet condenses the highest-yield Praxis 5005 facts into one quick review for your final week.
Praxis 5005 question bank
All 128 questions, by domain
A reference copy of every question in this practice test. Each answer stays hidden until you choose to show it. To practice with scoring, timing and your readiness score, use Start Test at the top of the page.
Earth Science (43)
Which layer of the Earth is composed primarily of liquid iron and nickel and is responsible for generating Earth's magnetic field?
- A.Outer core
- B.Inner core
- C.Mantle
- D.Crust
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Correct answer: Outer core
The outer core is a layer of molten iron and nickel whose flowing motion generates Earth's magnetic field. The inner core is solid, while the mantle and crust are largely silicate rock.
What is the primary cause of the seasons on Earth?
- A.The speed of Earth's rotation
- B.Earth's changing distance from the Sun
- C.The tilt of Earth's axis as it orbits the Sun
- D.Variations in the Sun's energy output
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Correct answer: The tilt of Earth's axis as it orbits the Sun
Seasons result from the roughly 23.5-degree tilt of Earth's axis, which changes the angle and duration of sunlight reaching each hemisphere throughout the year. Distance from the Sun has only a minor effect.
Which type of rock forms from the cooling and solidification of magma or lava?
- A.Metamorphic
- B.Igneous
- C.Sedimentary
- D.Fossiliferous
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Correct answer: Igneous
Igneous rock forms when molten rock (magma below ground or lava above) cools and crystallizes. Sedimentary rock forms from compacted sediments, and metamorphic rock forms from heat and pressure on existing rock.
Which process in the water cycle changes water vapor in the air into liquid water droplets, forming clouds?
- A.Precipitation
- B.Condensation
- C.Transpiration
- D.Evaporation
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Correct answer: Condensation
Condensation is the change of water vapor (gas) into liquid water, which forms clouds when it occurs in the atmosphere. Evaporation is the reverse process.
A geologist finds a layer of undisturbed sedimentary rock. According to the principle of superposition, which layer is the oldest?
- A.The top layer
- B.The layer with the most fossils
- C.The middle layer
- D.The bottom layer
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Correct answer: The bottom layer
The principle of superposition states that in undisturbed sedimentary rock layers, the oldest layer is at the bottom and the youngest is at the top, because lower layers were deposited first.
Which of the following best explains why we see different phases of the Moon?
- A.Clouds block parts of the Moon
- B.Earth's shadow falls on the Moon
- C.We see different amounts of the Moon's sunlit side as it orbits Earth
- D.The Moon produces varying amounts of light
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Correct answer: We see different amounts of the Moon's sunlit side as it orbits Earth
Moon phases occur because, as the Moon orbits Earth, we see varying portions of its sunlit half. The Moon does not make its own light; it reflects sunlight.
Which atmospheric layer contains the ozone layer that absorbs most of the Sun's harmful ultraviolet radiation?
- A.Thermosphere
- B.Mesosphere
- C.Stratosphere
- D.Troposphere
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Correct answer: Stratosphere
The stratosphere contains the ozone layer, which absorbs most ultraviolet radiation. The troposphere is where weather occurs, just below the stratosphere.
What is the main difference between weather and climate?
- A.Climate only refers to temperature
- B.Weather describes short-term conditions, climate describes long-term patterns
- C.They are the same thing
- D.Weather is long-term, climate is short-term
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Correct answer: Weather describes short-term conditions, climate describes long-term patterns
Weather refers to short-term atmospheric conditions at a place and time, while climate is the average pattern of weather over many years in a region.
Which feature is most directly formed by the movement and collision of tectonic plates?
- A.Sand dunes
- B.Glacial valleys
- C.Mountain ranges
- D.River deltas
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Correct answer: Mountain ranges
Mountain ranges commonly form where tectonic plates collide and crust is pushed upward. Sand dunes, deltas, and glacial valleys form mainly through erosion and deposition.
Erosion is best defined as which of the following?
- A.The breaking down of rock into smaller pieces in place
- B.The hardening of sediment into rock
- C.The movement of weathered material from one location to another
- D.The melting of rock into magma
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Correct answer: The movement of weathered material from one location to another
Erosion is the transport of weathered rock and soil by agents such as water, wind, or ice. Weathering is the in-place breakdown of rock before transport occurs.
Renewable resources differ from nonrenewable resources because renewable resources can
- A.Only be found underground
- B.Be replenished naturally over a relatively short time
- C.Be created by humans in factories
- D.Never be used up under any circumstances
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Correct answer: Be replenished naturally over a relatively short time
Renewable resources, such as sunlight, wind, and water, are naturally replenished on a human timescale, while nonrenewable resources like coal and oil take millions of years to form.
Which event causes a solar eclipse?
- A.Earth passes between the Sun and Moon
- B.Earth's rotation slows down
- C.The Moon passes between the Sun and Earth
- D.The Sun passes between Earth and the Moon
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Correct answer: The Moon passes between the Sun and Earth
A solar eclipse occurs when the Moon moves directly between the Sun and Earth, casting its shadow on Earth and blocking sunlight. When Earth is between the Sun and Moon, a lunar eclipse occurs.
Fossils of marine organisms found in rock high on a mountain most strongly suggest that
- A.The organisms could fly
- B.The mountain is made of water
- C.Fossils can move through rock
- D.That area was once covered by an ocean
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Correct answer: That area was once covered by an ocean
Marine fossils high on a mountain indicate that the rock formed underwater and was later uplifted, providing evidence of Earth's changing surface over geologic time.
Which of the following is the main source of energy that drives the water cycle?
- A.Ocean currents
- B.Wind
- C.The Sun
- D.Earth's core
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Correct answer: The Sun
Energy from the Sun drives the water cycle by causing evaporation of surface water, which then condenses and precipitates back to Earth.
A sudden release of energy along a fault in Earth's crust that causes the ground to shake is called a(n)
- A.Volcano
- B.Landslide
- C.Tsunami
- D.Earthquake
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Correct answer: Earthquake
An earthquake is the shaking of the ground caused by a sudden release of energy along a fault. A tsunami may be a result of an undersea earthquake but is itself a series of ocean waves.
Which of the following correctly orders the planets from closest to farthest from the Sun?
- A.Venus, Mercury, Mars, Earth
- B.Mars, Earth, Venus, Mercury
- C.Earth, Mercury, Venus, Mars
- D.Mercury, Venus, Earth, Mars
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Correct answer: Mercury, Venus, Earth, Mars
The order of the four inner planets from the Sun is Mercury, Venus, Earth, and Mars.
What primarily causes ocean tides on Earth?
- A.The gravitational pull of the Moon and Sun
- B.Changes in water temperature
- C.Earth's rotation alone
- D.Wind blowing across the ocean surface
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Correct answer: The gravitational pull of the Moon and Sun
Tides are caused mainly by the gravitational pull of the Moon, with a smaller contribution from the Sun, which creates bulges in Earth's oceans.
Which best describes how a river delta forms?
- A.Wind deposits sand in a fan shape
- B.Glaciers carve out a valley
- C.Volcanic ash settles near a coastline
- D.A river deposits sediment where it slows and enters a larger body of water
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Correct answer: A river deposits sediment where it slows and enters a larger body of water
A delta forms when a river slows as it enters a lake or ocean and deposits its sediment load, building up land at the river's mouth.
The greenhouse effect refers to the process by which
- A.The ozone layer blocks ultraviolet light
- B.Clouds reflect sunlight back to space
- C.Certain gases in the atmosphere trap heat near Earth's surface
- D.Plants release oxygen during the day
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Correct answer: Certain gases in the atmosphere trap heat near Earth's surface
The greenhouse effect occurs when gases like carbon dioxide and water vapor absorb and re-emit heat, keeping Earth's surface warmer than it would otherwise be.
Which of these is the best evidence that the continents were once joined together?
- A.Oceans are deeper than continents
- B.All continents have the same climate
- C.Continents are all the same size
- D.Matching rock types and fossils on continents now separated by oceans
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Correct answer: Matching rock types and fossils on continents now separated by oceans
Matching coastlines, rock formations, and fossils across continents now separated by oceans support the theory of continental drift and plate tectonics.
Which instrument would a meteorologist most likely use to measure air pressure?
- A.Barometer
- B.Thermometer
- C.Anemometer
- D.Hygrometer
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Correct answer: Barometer
A barometer measures atmospheric pressure. A thermometer measures temperature, an anemometer measures wind speed, and a hygrometer measures humidity.
Which of the following is classified as a fossil fuel?
- A.Wind energy
- B.Solar energy
- C.Hydroelectric energy
- D.Coal
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Correct answer: Coal
Coal is a fossil fuel formed from the remains of ancient plants over millions of years. Solar, wind, and hydroelectric are renewable energy sources.
Soil is best described as a mixture of
- A.Weathered rock, organic matter, water, and air
- B.Pure organic material only
- C.Melted rock and gas
- D.Only sand and clay
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Correct answer: Weathered rock, organic matter, water, and air
Soil is a mixture of weathered rock particles, decomposed organic matter (humus), water, and air, all of which support plant growth.
Why does the Moon appear to rise in the east and set in the west each day?
- A.The Sun pushes the Moon across the sky
- B.The Moon orbits Earth in one day
- C.The Moon is moving away from Earth
- D.Earth rotates on its axis from west to east
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Correct answer: Earth rotates on its axis from west to east
Earth's rotation from west to east makes the Moon, Sun, and stars appear to move across the sky from east to west each day.
A scientist studies the layers of ice in a glacier to learn about past climate. This field of study relies most on the idea that
- A.Glaciers move randomly
- B.Ice never changes over time
- C.Older material is generally found in deeper layers
- D.Ice contains no information
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Correct answer: Older material is generally found in deeper layers
Like sedimentary rock layers, deeper ice layers are older, so studying ice cores allows scientists to reconstruct past atmospheric and climate conditions.
Which of the following is the first step a student should take when using the scientific method to investigate a problem?
- A.Repeat the experiment
- B.Write a final report
- C.Ask a question about something observed
- D.Draw a conclusion
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Correct answer: Ask a question about something observed
Scientific inquiry typically begins with asking a question based on an observation, which then leads to forming a hypothesis and testing it.
A hypothesis is best described as a
- A.Testable prediction or explanation
- B.Final conclusion
- C.Random guess that cannot be tested
- D.Proven fact
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Correct answer: Testable prediction or explanation
A hypothesis is a testable, proposed explanation or prediction for an observation that can be supported or refuted through experimentation.
Which of the following is the best example of a qualitative observation?
- A.The plant grew 3 centimeters
- B.The liquid is blue
- C.The rock has a mass of 50 grams
- D.There are 12 seeds
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Correct answer: The liquid is blue
A qualitative observation describes a quality, such as color, without numbers. The other choices are quantitative because they use measurements or counts.
In an engineering design process, what should be done after a prototype is built and tested?
- A.Ignore the test results
- B.Use the results to improve and refine the design
- C.Begin a completely unrelated project
- D.Stop all work immediately
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Correct answer: Use the results to improve and refine the design
After testing a prototype, engineers analyze the results and use them to refine and improve the design, often repeating the cycle.
A teacher asks students to record the mass of a plant each week. The data they collect over several weeks is best described as
- A.An opinion
- B.A hypothesis
- C.Quantitative evidence
- D.A conclusion
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Correct answer: Quantitative evidence
Recorded measurements such as mass over time are quantitative evidence that can be used to support or refute a hypothesis.
When students compare their results with those of other groups in the class, they are practicing which part of science?
- A.Building equipment
- B.Cleaning up
- C.Forming a hypothesis
- D.Communicating and analyzing results
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Correct answer: Communicating and analyzing results
Comparing and discussing results with others is part of communicating and analyzing data, an important practice that helps verify findings.
Which planet is known as the Red Planet because of iron oxide on its surface?
- A.Jupiter
- B.Mars
- C.Venus
- D.Saturn
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Correct answer: Mars
Mars is called the Red Planet because iron oxide (rust) on its surface gives it a reddish appearance.
Which of the following best explains why deserts receive very little precipitation?
- A.They are always near oceans
- B.They have too many plants
- C.Dry air and conditions limit cloud formation and rainfall
- D.They are covered in ice
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Correct answer: Dry air and conditions limit cloud formation and rainfall
Deserts form in regions where dry conditions and air patterns limit cloud formation and rainfall, resulting in very little precipitation.
A student leaves a glass of liquid water outside on a hot, sunny day and returns to find the glass empty. Which process best explains where the water went?
- A.Evaporation, in which liquid water gained energy and changed to water vapor
- B.Condensation, in which water vapor changed to liquid
- C.Precipitation, in which water fell from clouds
- D.Sublimation, in which ice changed directly to vapor
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Correct answer: Evaporation, in which liquid water gained energy and changed to water vapor
Heat from the Sun added energy to the liquid water, turning it into water vapor that entered the air. This change from liquid to gas is evaporation.
Which of the following best describes why the Sun appears far larger and brighter than other stars in the night sky?
- A.The Sun is much closer to Earth than any other star
- B.The Sun is the largest star in the universe
- C.The Sun is the only star that produces its own light
- D.Other stars are blocked by Earth's atmosphere
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Correct answer: The Sun is much closer to Earth than any other star
Although many stars are larger and brighter than the Sun, the Sun appears much bigger and brighter because it is by far the closest star to Earth.
A weather forecaster reports that a cold front is moving into the region. A cold front generally forms where
- A.a mass of cold air pushes into and under a mass of warmer air
- B.warm air slowly rises over a stationary cold air mass
- C.two warm air masses collide over the ocean
- D.high pressure remains stationary for several days
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Correct answer: a mass of cold air pushes into and under a mass of warmer air
A cold front occurs when a denser, colder air mass advances and wedges beneath a warmer air mass, often producing clouds and precipitation.
Which of the following is the best evidence that Earth rotates on its axis?
- A.The apparent daily movement of the Sun across the sky
- B.The changing of the seasons through the year
- C.The phases of the Moon over about a month
- D.The presence of tides twice each day
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Correct answer: The apparent daily movement of the Sun across the sky
Earth's roughly 24-hour rotation on its axis causes the Sun, Moon, and stars to appear to move across the sky each day; the seasons are caused by Earth's tilt and orbit, not its rotation.
Weathering and erosion both shape Earth's surface. Which statement correctly distinguishes the two processes?
- A.Weathering breaks rock down in place; erosion transports the broken material away
- B.Weathering moves sediment; erosion breaks rock apart
- C.Both processes only occur underwater
- D.Both processes build new mountains
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Correct answer: Weathering breaks rock down in place; erosion transports the broken material away
Weathering is the breakdown of rock into smaller pieces where it sits, while erosion is the movement of those pieces by water, wind, ice, or gravity.
Which of the following correctly lists the inner (terrestrial) planets of our solar system?
- A.Mercury, Venus, Earth, and Mars
- B.Jupiter, Saturn, Uranus, and Neptune
- C.Mercury, Earth, Jupiter, and Saturn
- D.Venus, Mars, Saturn, and Neptune
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Correct answer: Mercury, Venus, Earth, and Mars
The four inner, rocky terrestrial planets in order from the Sun are Mercury, Venus, Earth, and Mars; the outer planets are the gas and ice giants.
A child wonders why the ocean has high and low tides. The primary cause of tides on Earth is the
- A.gravitational pull of the Moon (and Sun) on Earth's oceans
- B.rotation of Earth on its axis once per day
- C.heating of ocean water by sunlight
- D.wind blowing steadily across the ocean surface
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Correct answer: gravitational pull of the Moon (and Sun) on Earth's oceans
Tides are mainly caused by the gravitational pull of the Moon, with a smaller contribution from the Sun, creating bulges of water that produce high and low tides.
A student wants to find out whether plants grow taller with more sunlight. Which of the following is the independent variable in this investigation?
- A.The amount of sunlight the plants receive
- B.The height the plants reach
- C.The type of soil used for every plant
- D.The amount of water given to every plant
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Correct answer: The amount of sunlight the plants receive
The independent variable is the factor the student deliberately changes — here, the amount of sunlight. The plant height is the dependent variable that is measured.
Following the engineering design process, what should an engineer do immediately after testing a prototype that fails to meet the design criteria?
- A.Identify what went wrong and redesign or improve the prototype
- B.Abandon the project because the first design failed
- C.Begin writing the final report without changes
- D.Mass-produce the prototype as is
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Correct answer: Identify what went wrong and redesign or improve the prototype
The engineering design process is iterative: when a prototype fails to meet criteria, the engineer analyzes the results, improves the design, and tests again.
Why do scientists repeat experiments and compare their results with those of other researchers?
- A.To check that the results are reliable and can be reproduced
- B.To make sure no one else gets the same answer
- C.To use up extra laboratory materials
- D.To avoid having to write a conclusion
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Correct answer: To check that the results are reliable and can be reproduced
Repeating experiments and comparing results helps confirm that findings are reliable and reproducible, which is a core part of how science builds trustworthy knowledge.
Life Science (43)
Which of the following best describes a function of the cell membrane?
- A.Controlling what enters and leaves the cell
- B.Making proteins
- C.Storing the cell's genetic material
- D.Producing energy for the cell
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Correct answer: Controlling what enters and leaves the cell
The cell membrane regulates the movement of substances into and out of the cell, acting as a selective barrier. The nucleus stores genetic material.
During photosynthesis, plants use carbon dioxide, water, and sunlight to produce
- A.Carbon dioxide and water
- B.Glucose and oxygen
- C.Protein and salt
- D.Nitrogen and carbon
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Correct answer: Glucose and oxygen
Photosynthesis converts carbon dioxide, water, and light energy into glucose (food) and oxygen, which is released into the air.
In a food chain, organisms that make their own food through photosynthesis are called
- A.Consumers
- B.Decomposers
- C.Predators
- D.Producers
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Correct answer: Producers
Producers, such as green plants, make their own food using sunlight. Consumers eat other organisms, and decomposers break down dead material.
Which of the following is an example of an inherited trait rather than a learned behavior?
- A.Speaking a particular language
- B.Playing a musical instrument
- C.Eye color in humans
- D.Riding a bicycle
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Correct answer: Eye color in humans
Eye color is determined by genes passed from parents to offspring, making it inherited. Speaking a language and riding a bicycle are learned behaviors.
What is the primary role of decomposers in an ecosystem?
- A.To produce oxygen
- B.To break down dead organisms and recycle nutrients
- C.To hunt other animals
- D.To capture sunlight
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Correct answer: To break down dead organisms and recycle nutrients
Decomposers, such as bacteria and fungi, break down dead organisms and waste, returning nutrients to the soil for use by producers.
Which body system is primarily responsible for transporting oxygen and nutrients throughout the body?
- A.Nervous system
- B.Respiratory system
- C.Digestive system
- D.Circulatory system
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Correct answer: Circulatory system
The circulatory system, including the heart and blood vessels, transports oxygen, nutrients, and wastes throughout the body.
An adaptation that helps an organism survive in its environment is best described as a
- A.Trait that decreases survival
- B.Trait that only appears after death
- C.Trait that increases an organism's chances of surviving and reproducing
- D.Behavior that has no effect on survival
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Correct answer: Trait that increases an organism's chances of surviving and reproducing
An adaptation is a structural, physiological, or behavioral trait that improves an organism's chances of surviving and reproducing in its environment.
Which of the following correctly describes a producer-consumer relationship in an ecosystem?
- A.The Sun shines on a plant
- B.Water evaporates from a lake
- C.A rabbit eats grass
- D.Bacteria break down a log
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Correct answer: A rabbit eats grass
A rabbit (consumer) eating grass (producer) shows the transfer of energy from a producer to a consumer in a food chain.
Which stage in the life cycle of a butterfly comes immediately after the larva (caterpillar) stage?
- A.Pupa
- B.Adult
- C.Nymph
- D.Egg
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Correct answer: Pupa
In complete metamorphosis, the order is egg, larva, pupa, and adult. The pupa (chrysalis) stage follows the larva stage.
What do all living things require in order to carry out life processes?
- A.Cold temperatures
- B.Soil
- C.Sunlight only
- D.Energy
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Correct answer: Energy
All living organisms require energy to grow, move, reproduce, and maintain life processes, though they obtain it in different ways.
If a population of insects develops resistance to a pesticide over many generations, this is an example of
- A.Photosynthesis
- B.Metamorphosis
- C.Learned behavior
- D.Natural selection
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Correct answer: Natural selection
Natural selection occurs when individuals with favorable traits (such as pesticide resistance) survive and reproduce more, increasing that trait in the population over time.
Which structure in a plant cell is responsible for capturing light energy for photosynthesis?
- A.Vacuole
- B.Chloroplast
- C.Mitochondria
- D.Nucleus
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Correct answer: Chloroplast
Chloroplasts contain chlorophyll, which captures light energy used to make food during photosynthesis. They are found in plant cells but not animal cells.
A food web is more accurate than a simple food chain because it
- A.Includes only producers
- B.Shows only one path of energy
- C.Ignores decomposers
- D.Shows the many feeding relationships among organisms in an ecosystem
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Correct answer: Shows the many feeding relationships among organisms in an ecosystem
A food web shows the interconnected feeding relationships in an ecosystem, reflecting that most organisms eat and are eaten by more than one species.
Which of the following best explains why offspring resemble but are not identical to their parents?
- A.Traits are randomly created at birth
- B.Environment alone determines all traits
- C.Offspring choose their own traits
- D.They inherit a combination of genes from both parents
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Correct answer: They inherit a combination of genes from both parents
Offspring inherit genetic material from both parents, so they share similarities with each but receive a unique combination, leading to variation.
Which gas do animals take in and plants release during the day as part of gas exchange?
- A.Hydrogen
- B.Oxygen
- C.Nitrogen
- D.Carbon dioxide
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Correct answer: Oxygen
Animals take in oxygen for respiration, and plants release oxygen during photosynthesis in the daylight, illustrating the interdependence of organisms.
An organism that eats only plants is classified as a
- A.Omnivore
- B.Carnivore
- C.Decomposer
- D.Herbivore
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Correct answer: Herbivore
An herbivore eats only plants. Carnivores eat only animals, and omnivores eat both plants and animals.
What is the function of roots in most plants?
- A.To capture sunlight
- B.To release oxygen
- C.To produce flowers
- D.To absorb water and minerals and anchor the plant
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Correct answer: To absorb water and minerals and anchor the plant
Roots absorb water and dissolved minerals from the soil and anchor the plant in place. Leaves are mainly responsible for capturing sunlight.
Which of the following describes a population in an ecosystem?
- A.The energy available in an area
- B.All the members of one species living in the same area
- C.All the living and nonliving things in an area
- D.Only the producers in an area
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Correct answer: All the members of one species living in the same area
A population is all the members of a single species living in a particular area. A community includes all the populations, and an ecosystem includes living and nonliving parts.
Which of the following is a behavioral adaptation rather than a physical one?
- A.A fish's gills
- B.A cactus's sharp spines
- C.A polar bear's thick fur
- D.A bird migrating south for the winter
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Correct answer: A bird migrating south for the winter
Migration is a behavioral adaptation, an action that helps survival. Thick fur, spines, and gills are physical (structural) adaptations.
Cellular respiration in living things mainly serves to
- A.Absorb water
- B.Release energy stored in food molecules
- C.Reproduce cells
- D.Make food from sunlight
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Correct answer: Release energy stored in food molecules
Cellular respiration breaks down glucose to release energy that cells use for life processes, using oxygen and producing carbon dioxide and water.
Which of the following is the smallest unit of life capable of carrying out all life functions?
- A.Organ
- B.Tissue
- C.Organism
- D.Cell
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Correct answer: Cell
The cell is the basic structural and functional unit of life. Tissues, organs, and organisms are made of cells.
When a large number of trees in a forest are cut down, the most likely immediate effect on the ecosystem is
- A.More producers in the area
- B.Cooler temperatures only
- C.A loss of habitat for many organisms
- D.An increase in animal habitats
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Correct answer: A loss of habitat for many organisms
Removing trees destroys habitat and food sources, which can reduce biodiversity and disrupt the balance of the ecosystem.
Which of the following pairs an organism with a correct example of camouflage?
- A.A bee's stinger
- B.A walking stick insect resembling a twig
- C.A bird singing loudly
- D.A skunk's strong odor
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Correct answer: A walking stick insect resembling a twig
Camouflage allows an organism to blend in with its surroundings; a walking stick insect resembling a twig avoids detection by predators.
In a typical food chain, energy is lost mostly as which form at each level?
- A.Heat
- B.Light
- C.Sound
- D.Electricity
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Correct answer: Heat
As energy moves up a food chain, much of it is lost as heat during life processes, so less energy is available at each higher level.
Which is the correct sequence from smallest to largest level of biological organization?
- A.Organ, organism, cell, tissue
- B.Organism, organ, tissue, cell
- C.Cell, tissue, organ, organism
- D.Tissue, cell, organism, organ
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Correct answer: Cell, tissue, organ, organism
The correct order from smallest to largest is cell, tissue, organ, organ system, and organism.
Why are bees important to many flowering plants?
- A.They break down dead leaves
- B.They transfer pollen, allowing plants to reproduce
- C.They provide shade
- D.They eat harmful insects
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Correct answer: They transfer pollen, allowing plants to reproduce
Bees act as pollinators, transferring pollen between flowers so that plants can produce seeds and fruit, an example of mutualism.
In an experiment, the variable that the scientist deliberately changes is the
- A.Controlled variable
- B.Independent variable
- C.Constant
- D.Dependent variable
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Correct answer: Independent variable
The independent variable is the one the scientist deliberately changes to see its effect on the dependent variable, which is measured.
Which of the following is the best tool for measuring the volume of a liquid?
- A.Balance
- B.Graduated cylinder
- C.Thermometer
- D.Ruler
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Correct answer: Graduated cylinder
A graduated cylinder is designed to measure the volume of liquids accurately. A balance measures mass and a ruler measures length.
A graph that shows how the temperature of water changes over time as it is heated would best be displayed as a
- A.Pie chart
- B.Photograph
- C.Map
- D.Line graph
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Correct answer: Line graph
A line graph is best for showing how one variable changes continuously over time, such as temperature increasing as water is heated.
To make an experiment a fair test, a scientist should change
- A.As many variables as possible
- B.No variables at all
- C.Only one variable at a time
- D.The conclusion
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Correct answer: Only one variable at a time
A fair test changes only one variable at a time while keeping others constant, so any observed effect can be attributed to that single variable.
Which safety practice is most appropriate when heating substances in a science classroom?
- A.Lean closely over the container
- B.Taste the substance to identify it
- C.Wear safety goggles
- D.Remove all adult supervision
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Correct answer: Wear safety goggles
Wearing safety goggles protects the eyes during experiments. Tasting unknown substances and leaning over heated materials are unsafe practices.
Which of the following questions can best be answered through a scientific investigation?
- A.Does adding fertilizer increase plant growth?
- B.Which painting is the most beautiful?
- C.Which season is the happiest?
- D.What is the best type of music?
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Correct answer: Does adding fertilizer increase plant growth?
A testable scientific question can be investigated through observation and experiment with measurable results, such as measuring plant growth with and without fertilizer.
Which of the following organisms would most likely be at the base of an ocean food chain?
- A.Sea turtles
- B.Phytoplankton
- C.Sharks
- D.Whales
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Correct answer: Phytoplankton
Phytoplankton are tiny producers that make food through photosynthesis and form the base of most ocean food chains.
Which of the following correctly traces the path of energy through a simple ecosystem?
- A.Sun to producers to consumers to decomposers
- B.Decomposers to consumers to producers to Sun
- C.Consumers to producers to Sun to decomposers
- D.Producers to Sun to decomposers to consumers
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Correct answer: Sun to producers to consumers to decomposers
Energy originates from the Sun, is captured by producers during photosynthesis, passes to consumers that eat them, and is finally released by decomposers that break down dead matter.
During cellular respiration, cells use glucose and oxygen to release energy. The chemical equation for this process can be written as which of the following?
- A.
- B.
- C.
- D.
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Correct answer:
In cellular respiration, glucose and oxygen react to produce carbon dioxide, water, and usable energy: . The reverse equation describes photosynthesis.
A trait such as eye color is passed from parents to offspring through
- A.genes carried on chromosomes
- B.behaviors learned during the organism's life
- C.the food the organism eats
- D.the climate where the organism lives
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Correct answer: genes carried on chromosomes
Inherited traits like eye color are determined by genes located on chromosomes, which are passed from parents to offspring during reproduction.
Which of the following best explains the role of producers in a food web?
- A.They convert energy from sunlight into food through photosynthesis
- B.They break down dead organisms and return nutrients to the soil
- C.They obtain energy only by eating other animals
- D.They recycle oxygen by consuming carbon dioxide at night
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Correct answer: They convert energy from sunlight into food through photosynthesis
Producers, such as green plants and algae, use photosynthesis to convert sunlight, water, and carbon dioxide into food, forming the base of nearly every food web.
A population of moths in a forest includes both light- and dark-colored individuals. After tree bark becomes darkened by pollution, the dark moths survive better and become more common over generations. This change is an example of
- A.natural selection
- B.a learned behavior
- C.a sudden change of state
- D.metamorphosis
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Correct answer: natural selection
Because the dark moths are better camouflaged and survive to reproduce more often, their trait becomes more common over generations — a classic example of natural selection.
Which body system works most directly with the respiratory system to deliver oxygen to body cells?
- A.The circulatory system
- B.The digestive system
- C.The skeletal system
- D.The nervous system
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Correct answer: The circulatory system
The respiratory system brings oxygen into the lungs, and the circulatory system carries that oxygen in the blood to cells throughout the body, so the two systems work closely together.
A scientist classifies organisms into a food chain. Which sequence correctly shows the flow from producer to top consumer?
- A.Grass to grasshopper to frog to snake
- B.Snake to frog to grasshopper to grass
- C.Frog to grass to snake to grasshopper
- D.Grasshopper to grass to snake to frog
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Correct answer: Grass to grasshopper to frog to snake
Energy flows from the producer (grass) to a primary consumer (grasshopper), then to higher-level consumers (frog, then snake). The chain always starts with the producer.
In the investigation above, which factor should be kept the same for all plants to make it a fair test?
- A.The amount of water given to each plant
- B.The amount of sunlight each plant receives
- C.The final height of each plant
- D.The number of leaves on each plant at the end
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Correct answer: The amount of water given to each plant
To isolate the effect of sunlight, all other variables — such as water, soil, and pot size — must be held constant. These are the controlled variables that keep the test fair.
Which of the following questions can best be investigated through a controlled scientific experiment?
- A.Does fertilizer affect how tall tomato plants grow?
- B.Which painting in a museum is the most beautiful?
- C.Is rock music better than classical music?
- D.What is the best flavor of ice cream?
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Correct answer: Does fertilizer affect how tall tomato plants grow?
A scientific experiment must test a measurable, testable question. Plant growth in response to fertilizer can be measured and controlled, while questions of opinion or preference cannot.
A teacher asks students to wear safety goggles before an activity that involves heating a liquid. This instruction is an example of
- A.following proper laboratory safety practices
- B.forming a scientific hypothesis
- C.recording quantitative data
- D.designing a controlled experiment
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Correct answer: following proper laboratory safety practices
Wearing protective equipment such as goggles when heating substances is a standard laboratory safety practice that protects students from splashes and fumes.
Physical Science (42)
Matter is best defined as
- A.Anything that has mass and takes up space
- B.Only solid objects
- C.Light and heat
- D.Energy in motion
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Correct answer: Anything that has mass and takes up space
Matter is anything that has mass and occupies space. It exists in states such as solid, liquid, and gas.
When an ice cube melts into water, this is an example of a
- A.Biological change
- B.Physical change
- C.Nuclear change
- D.Chemical change
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Correct answer: Physical change
Melting is a physical change because the substance is still water; only its state changes from solid to liquid, and no new substance forms.
Which of the following is an example of a chemical change?
- A.Boiling water
- B.Wood burning to ash
- C.Melting butter
- D.Crushing a can
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Correct answer: Wood burning to ash
Burning wood is a chemical change because new substances (ash, smoke, and gases) are formed. The other options are physical changes.
According to Newton's first law of motion, an object at rest will
- A.Stay at rest unless acted on by an unbalanced force
- B.Lose all its mass
- C.Begin moving on its own
- D.Always speed up
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Correct answer: Stay at rest unless acted on by an unbalanced force
Newton's first law (inertia) states that an object at rest stays at rest, and an object in motion stays in motion, unless an unbalanced force acts on it.
Which of the following best describes the particles in a solid compared to those in a gas?
- A.Solid and gas particles are arranged the same way
- B.Solid particles are far apart and move freely
- C.Gas particles cannot move
- D.Solid particles are closely packed and vibrate in place
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Correct answer: Solid particles are closely packed and vibrate in place
In a solid, particles are tightly packed and vibrate in fixed positions, while gas particles are far apart and move freely in all directions.
Which of the following is a form of energy?
- A.Mass
- B.Volume
- C.Light
- D.Density
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Correct answer: Light
Light is a form of energy (electromagnetic energy). Mass, volume, and density are properties of matter, not forms of energy.
A ball rolling down a hill is an example of which energy transformation?
- A.Electrical energy to chemical energy
- B.Chemical energy to light energy
- C.Sound energy to heat energy
- D.Potential energy to kinetic energy
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Correct answer: Potential energy to kinetic energy
As the ball rolls downhill, stored gravitational potential energy is converted into kinetic energy, the energy of motion.
Which simple machine is a ramp used to move heavy objects to a higher level?
- A.Wheel and axle
- B.Inclined plane
- C.Pulley
- D.Lever
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Correct answer: Inclined plane
A ramp is an inclined plane, a flat surface set at an angle that reduces the force needed to raise an object.
Which of the following materials is the best conductor of electricity?
- A.Copper
- B.Glass
- C.Wood
- D.Rubber
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Correct answer: Copper
Copper is a metal and an excellent conductor of electricity. Rubber, glass, and wood are insulators that resist the flow of electric current.
Sound is produced by
- A.Light waves
- B.Chemical reactions only
- C.Magnetic fields
- D.Vibrating objects
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Correct answer: Vibrating objects
Sound is produced when an object vibrates, creating waves that travel through a medium such as air, water, or solids.
What happens to the speed of an object when a net force is applied in the direction of its motion?
- A.It stays the same
- B.It slows down
- C.It speeds up
- D.It stops immediately
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Correct answer: It speeds up
A net force applied in the direction of motion causes the object to accelerate, increasing its speed, in line with Newton's second law.
Which of the following describes a magnet's behavior?
- A.All poles always attract
- B.Magnets only affect wood
- C.Like poles repel and unlike poles attract
- D.Like poles attract and unlike poles repel
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Correct answer: Like poles repel and unlike poles attract
In magnets, like poles (north-north or south-south) repel each other, while unlike poles (north-south) attract.
Heat naturally flows from
- A.A warmer object to a colder object
- B.Objects of equal temperature
- C.A colder object to a warmer object
- D.Light objects to heavy objects
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Correct answer: A warmer object to a colder object
Heat energy always flows naturally from a warmer object to a cooler one until both reach the same temperature (thermal equilibrium).
Which of the following is a mixture rather than a pure substance?
- A.Salad
- B.Oxygen gas
- C.Pure water
- D.Table salt
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Correct answer: Salad
A salad is a mixture because it contains several substances physically combined that keep their own properties and can be separated.
Which of the following is the best example of evaporation?
- A.Rain falling from the sky
- B.Water vapor forming a cloud
- C.A puddle of water drying up in the sun
- D.Ice forming on a pond
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Correct answer: A puddle of water drying up in the sun
Evaporation is the change of liquid water into water vapor; a puddle drying in the sun shows liquid turning to gas.
Friction is a force that
- A.Speeds up moving objects
- B.Opposes the motion between surfaces in contact
- C.Removes mass from objects
- D.Only acts on liquids
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Correct answer: Opposes the motion between surfaces in contact
Friction is a force that resists motion between two surfaces in contact, often converting kinetic energy into heat.
Which color of light is absorbed most by a black object in sunlight?
- A.All colors of visible light
- B.Only blue light
- C.Only red light
- D.No light at all
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Correct answer: All colors of visible light
A black object absorbs all colors of visible light, which is why it appears black and tends to warm up in sunlight.
The amount of matter in an object is called its
- A.Weight
- B.Density
- C.Volume
- D.Mass
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Correct answer: Mass
Mass is the amount of matter in an object and does not change with location. Weight depends on gravity and can change.
Which of the following best demonstrates that air takes up space?
- A.A balloon expands when blown up
- B.Sunlight warms the ground
- C.Salt dissolves in water
- D.A magnet attracts a paper clip
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Correct answer: A balloon expands when blown up
A balloon expanding when blown up shows that air (a gas) occupies space, demonstrating that gases are matter.
When salt dissolves in water, the salt and water form a
- A.Solid
- B.Solution
- C.New element
- D.Compound
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Correct answer: Solution
When salt dissolves evenly in water, it forms a solution, which is a type of mixture in which one substance is dissolved in another.
A pulley is most useful because it can change the
- A.Direction of an applied force
- B.Temperature of an object
- C.Mass of an object
- D.Color of an object
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Correct answer: Direction of an applied force
A pulley is a simple machine that can change the direction of a force and, with multiple pulleys, reduce the effort needed to lift a load.
Which statement about energy is correct according to the law of conservation of energy?
- A.Energy can be transformed but not created or destroyed
- B.Energy can be created from nothing
- C.Energy can be destroyed completely
- D.Energy only exists as light
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Correct answer: Energy can be transformed but not created or destroyed
The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.
Which of the following circuits will allow a bulb to light?
- A.A broken wire
- B.An open circuit
- C.A complete (closed) circuit
- D.A circuit with no power source
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Correct answer: A complete (closed) circuit
A bulb lights only in a complete (closed) circuit that provides an unbroken path for current to flow from the power source through the bulb and back.
Which of the following is the best example of potential energy?
- A.A flying bird
- B.A running child
- C.A moving car
- D.A stretched rubber band
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Correct answer: A stretched rubber band
A stretched rubber band stores elastic potential energy, which can be released to do work. The other examples involve kinetic energy of motion.
Density is best described as the amount of
- A.Light a substance gives off
- B.Mass in a given volume
- C.Force on an object
- D.Energy in a substance
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Correct answer: Mass in a given volume
Density is the amount of mass per unit of volume. An object with more mass packed into a smaller space has a higher density.
Why is it important to have a control group in a scientific experiment?
- A.To change several variables at once
- B.To make the experiment longer
- C.To provide a basis for comparison with the experimental group
- D.To eliminate the need for data
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Correct answer: To provide a basis for comparison with the experimental group
A control group provides a standard for comparison, allowing the scientist to determine whether the independent variable caused the observed effect.
When scientists repeat an experiment and get similar results, the results are said to be
- A.Random
- B.Reproducible
- C.Biased
- D.Incorrect
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Correct answer: Reproducible
Reproducible results, those that can be obtained again by others under the same conditions, increase confidence in scientific findings.
An engineer designing a new bridge first needs to clearly identify the
- A.Color of the bridge
- B.Name of the project
- C.Problem and criteria the design must meet
- D.Final cost only
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Correct answer: Problem and criteria the design must meet
The engineering design process begins by defining the problem and identifying the criteria and constraints a successful solution must satisfy.
Which of the following best describes the role of a model in science?
- A.It must be life-sized
- B.It is only useful for art
- C.It represents an object or system to help explain or predict
- D.It always replaces real experiments
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Correct answer: It represents an object or system to help explain or predict
Scientific models represent objects, systems, or processes to help explain ideas and make predictions, even when the real thing is too large, small, or complex to observe directly.
Which of the following statements best describes a scientific theory?
- A.A guess with no evidence
- B.A law that can never be questioned
- C.A single observation
- D.A well-supported explanation based on a large body of evidence
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Correct answer: A well-supported explanation based on a large body of evidence
A scientific theory is a broad, well-substantiated explanation supported by a large body of evidence from many experiments and observations.
A student observes bubbles forming when vinegar is poured on baking soda. This is most likely evidence of a
- A.Magnetic attraction
- B.Chemical reaction producing a gas
- C.Physical change only
- D.Change of state from solid to liquid only
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Correct answer: Chemical reaction producing a gas
The bubbling indicates a chemical reaction in which a new substance (carbon dioxide gas) is produced when vinegar and baking soda combine.
Which of the following correctly describes the direction of gravity's pull on objects near Earth's surface?
- A.Sideways
- B.Downward, toward Earth's center
- C.It changes direction randomly
- D.Upward, away from Earth
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Correct answer: Downward, toward Earth's center
Gravity pulls objects toward the center of the Earth, which is why dropped objects fall downward.
Which of the following is the best reason for keeping a written record during a scientific investigation?
- A.To replace the hypothesis
- B.To make the experiment look longer
- C.To accurately track observations and data for analysis
- D.To avoid doing the experiment
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Correct answer: To accurately track observations and data for analysis
Keeping accurate written records of observations and data allows scientists to analyze results, identify patterns, and share or repeat the investigation.
Two students push a box across the floor in opposite directions with equal force, and the box does not move. The forces on the box are best described as
- A.balanced forces
- B.unbalanced forces
- C.a single net force
- D.frictionless forces
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Correct answer: balanced forces
When equal forces act in opposite directions, they cancel out. These balanced forces produce no change in motion, so the box stays still.
Which of the following correctly describes how the particles of matter differ between a solid, a liquid, and a gas?
- A.Particles are tightly packed in a solid, looser in a liquid, and far apart in a gas
- B.Particles are far apart in a solid and tightly packed in a gas
- C.Particles move fastest in a solid and slowest in a gas
- D.Particles in all three states are spaced exactly the same
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Correct answer: Particles are tightly packed in a solid, looser in a liquid, and far apart in a gas
In a solid, particles are closely packed and vibrate in place; in a liquid they are close but can slide past one another; in a gas they are spread far apart and move freely.
A 2-kilogram object and a 5-kilogram object are dropped from the same height in a vacuum (no air resistance). Which statement is correct?
- A.Both objects fall at the same rate and land at the same time
- B.The 5-kilogram object lands first because it is heavier
- C.The 2-kilogram object lands first because it is lighter
- D.Neither object falls because there is no air
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Correct answer: Both objects fall at the same rate and land at the same time
In the absence of air resistance, all objects fall with the same acceleration due to gravity regardless of mass, so both land at the same time.
Which energy transformation best describes what happens when a battery powers a flashlight bulb?
- A.Chemical energy is transformed into electrical energy and then into light and heat
- B.Light energy is transformed into chemical energy
- C.Sound energy is transformed into electrical energy
- D.Nuclear energy is transformed into mechanical energy
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Correct answer: Chemical energy is transformed into electrical energy and then into light and heat
A battery stores chemical energy, converts it to electrical energy that flows through the circuit, and the bulb converts that electrical energy into light (and some heat).
A student mixes sugar into a glass of water until it dissolves completely. The result is best classified as a
- A.solution (a homogeneous mixture)
- B.pure element
- C.chemical compound formed by a reaction
- D.heterogeneous mixture with visible parts
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Correct answer: solution (a homogeneous mixture)
When sugar dissolves evenly in water with no visible separate parts, it forms a solution, which is a homogeneous mixture; no new substance is created.
Which simple machine changes the direction of a force, making it easier to raise a flag to the top of a pole?
- A.A pulley
- B.A wedge
- C.A screw
- D.An inclined plane
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Correct answer: A pulley
A pulley uses a wheel and a rope to change the direction of the applied force, so pulling down on the rope raises the flag upward.
Light traveling from air into a glass of water appears to bend at the surface. This bending of light as it passes from one material to another is called
- A.refraction
- B.reflection
- C.absorption
- D.transmission
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Correct answer: refraction
Refraction is the bending of light as it changes speed moving from one medium (air) into another (water), which is why a straw can look bent in a glass of water.
A class measures the temperature of cooling water every minute and wants to display how temperature changes over time. Which type of graph is most appropriate?
- A.A line graph
- B.A pie chart
- C.A pictograph of unrelated objects
- D.A single bar showing only the final temperature
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Correct answer: A line graph
A line graph is best for showing how one quantity (temperature) changes continuously over another (time), making trends easy to see.
A student records the mass of a substance as 24.5 grams. The instrument used to obtain this measurement is most likely a
- A.balance
- B.thermometer
- C.graduated cylinder
- D.stopwatch
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Correct answer: balance
Mass is measured with a balance. A thermometer measures temperature, a graduated cylinder measures liquid volume, and a stopwatch measures time.
References
- 1.ETS. “Elementary Education: Science Subtest (5005).” praxis.ets.org, 2026. ↑
- 2.ETS. “Elementary Education: Multiple Subjects (5001) Study Companion.” praxis.ets.org. ↑
- 3.ETS. “Praxis Elementary Education: Multiple Subjects (5001).” praxis.ets.org. ↑
- 4.ETS. “Praxis Tests — How to Register.” ets.org. ↑
- 5.ETS. “Praxis Tests — Scores.” praxis.ets.org. ↑
- 6.ETS. “Praxis — Manage Your Test Appointment (retake policy).” praxis.ets.org. ↑
- 7.Career Employer. “Praxis 5005 practice-test performance data.” careeremployer.com, updated daily, CC BY 4.0. ↑
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