TEAS Science: Scientific Reasoning (Quiz 2) Welcome to your TEAS Practice Quizzes. Note: We designed Two (2) sets of practice quizzes for this Domain. Each set has 30 questions. TEAS Science (quiz 2): Scientific Reasoning. (30 questions) Please click NEXT to start your Free TEAS Practice Quizzes right away. Best of Luck! 1. Dissolved oxygen (DO) is an important indicator of water quality, and oxygen levels that are too high or too low can harm aquatic ecosystems. A biologist noticed that fish were dying in a local lake and was concerned that the DO levels were too low to support aquatic life due to extremely high temperatures that summer. To measure the DO levels, she brought back several lake water samples to her laboratory to measure the DO concentration as a function of temperature. To do this, she heated several samples of lake water to various temperatures and then measured the DO concentration in each sample. Some samples were kept at the outdoors temperature. Dissolved oxygen concentration The season Temperature Volume of water None 2. A group of students was studying the effects of drinking 8 oz. of milk at 9 p.m. on the amount of sleep they got. Which is the dependent variable? The amount of sleep The time they woke up The bedtime The amount of milk None 3. When going to the grocery store, you need to purchase some vegetables, which are sold by weight. Which of the following units would the weight of the vegetables be expressed in? Pascals Kilograms Newtons Coulombs None 4. Which of the following is not an SI base unit? Kilogram Meter Second Liter None 5. Which of the following units is derived from SI base units? Dram Pound Mile Kilometer None 6. In an experiment, a reaction requires 0.006 kg of KCl, but the scale used to measure the mass only reports masses in grams (g). Which of the following values would the scale read if the exact mass of KCl was measured? 60 g 6 g 0.6 g 600 g None 7. Which of the following prefixes would likely be the most appropriate for measuring the weight of a 2,500 g kitten? Pico Kilo Giga Nano None 8. Which of the following would be the best choice to measure 0.0015 grams of a chemical reagent? Graduated cylinder Analytical balance Metric ruler Triple beam balance None 9. A book weighs 2.2 kg. How much does it weigh in grams? 0.22 g 2,200 g 220 g 22 g None 10. Which of the following is the correct formula to measure volume? Volume = 2(height + width) – length Volume = length2 x height + width Volume = length3 x width2 x height Volume = length x width x height None 11. The International Space Station orbits earth at a distance of 408 km. Sunlight reflects off it and travels to Earth at a speed of 299,792 km/s. How long does it take the light to reach the Earth? 0.0014 s 1.22 x 108 s 734 s 14 s None 12. A well-controlled experiment was conducted where researchers noted that a new antibiotic eliminated a bacterial sinus infection. Which of the following can be inferred from this result? The medication killed the bacteria responsible for the sinus infection. The medication alters the patient’s DNA to help them fight off an infection. The medication helped eliminate the patient’s allergies. The medication acted as an antihistamine to cure the patient’s runny nose. None 13. Which of the following describes a ‘control variable’ in an experiment? The variable that changes The variable that is held constant The dependent variable The variable that is discarded None 14. Which of the following is true about control variables? The control variable is the only piece of data that is important during an experiment. Control variables are kept constant to help understand the relationship of other variables. Control variables are used to minimize the relative error of measurements. The control variable is the only variable measured in an experiment. None 15. Which is the most appropriate unit to measure the weight of groceries in a store? Nanograms Micrograms Tons Kilograms None 16. Based on this bar graph, which of the following statements is true? Regardless of sex, people 60 years old and older take the most antidepressant medication Among men, the smallest group to take antidepressant medication is 12-17 years old. Among women, the largest group to take antidepressant medication is 18-39 years old. Regardless of sex, the age group between 18-39 years takes the lowest percentage of antidepressant medication. None 17. Which of the following are likely the causes of diabetes type 2? Insulin resistance, difficulty breathing Lack of exercise, unhealthy food choices, obesity Weakened heart, insulin resistance Too much exercise, fruit-based diet None 18. Consider the data on cumulative lung cancer risk shown in the graph. Which of the following best describes the likely order of events? Genetic susceptibility, smoking until age 30, high percent risk of death before 55 years Genetic susceptibility, continued smoking after 65 years old, cancer, high percent risk of death Smoking until age 50, genetic susceptibility, death, cancer Genetic susceptibility, never smoked, cancer, early death at any time during the lifespan None 19. Which of the following is a hypothesis? One liter of water was added to a reaction. When I added fertilizer to my plants, they grew more quickly. Five different breeds of dogs are at the dog park. If a student gets more sleep, they will get a higher test score. None 20. A hypothesis must be which of the following? Accurate Correct Precise Testable None 21. A biologist hypothesized that zebras and horses evolved from the same common ancestor 4 million years ago. Which of the following pieces of evidence most strongly supports this hypothesis? Horses and zebras have similar appearances The genome of zebras and horses are very similar to the common ancestor Horses and zebras in similar climates Horses and zebras gallop at the same speeds None 22. H2O2 is a strong oxidizer that is used to degrade a variety of compounds. Ultraviolet-visible (UV-Vis) spectroscopy is a measurement technique that correlates the amount of UV light a substance absorbs with its concentration. The above is background information, and the information below is the abstract of a scientific paper. Identify the hypothesis. Pharmaceuticals have been detected in wastewaters worldwide and have the potential to harm both aquatic and human life. Traditional water treatment technologies are unable to remove these compounds from water, so various methods have been developed to degrade these compounds, including oxidation. In this paper, H2O2 is proposed to oxidatively degrade the anti-inflammatory drug, naproxen when it is dissolved in water. UV-Vis spectroscopy is used to measure the concentration of naproxen in water after samples are treated with hydrogen peroxide (H2O2). Experiments were conducted to test the influence of H2O2 concentration, reaction time, and temperature on the degradation of naproxen. The results showed that 98% of naproxen could be degraded by 0.25 M H2O2 within 2 hours at 30 oC. Thus, we can conclude that hydrogen peroxide can be used to degrade naproxen in wastewaters. What is the the hypothesis proposed in the experiment above? In this paper, H2O2 is proposed to oxidatively degrade the anti-inflammatory drug, naproxen when it is dissolved in water. Experiments were conducted to test the influence of H2O2 concentration, reaction time, and temperature on the degradation of naproxen. Thus, we can conclude that hydrogen peroxide can be used to degrade naproxen in wastewaters. UV-Vis spectroscopy is used to measure the concentration of naproxen in water after samples are treated with hydrogen peroxide (H2O2). None 23. Dissolved oxygen (DO) is an important indicator of water quality, and oxygen levels that are too high or too low can harm aquatic ecosystems. A biologist noticed that fish were dying in a local lake and was concerned that the DO levels were too low to support aquatic life due to extremely high temperatures that summer. To measure the DO levels, she brought back several lake water samples to her laboratory to measure the DO concentration as a function of temperature. To do this, she heated several samples of lake water to various temperatures and then measured the DO concentration in each sample. Some samples were kept at the outdoors temperature. Which of the following is the independent variable? Dissolved oxygen concentration Temperature Location of the lake Volume of water None 24. A biologist hypothesized that high humidity environments increased the growth rate of certain bacteria. Which of the following observations refutes this hypothesis? When placed in a dessicator, a petri dish had a decreased bacterial growth rate. A greenhouse was found to have more bacteria compared with an outdoor garden. When placed next to a pond, a petri dish had an increased growth rate. Higher bacteria growth was observed in the Mojave Desert compared with the Everglades. None 25. Which of the following options is a valid conclusion about the data below? There is no correlation between gender and antidepressant use. Older people suffer from depression more than young people. Gender is a significant factor that determines whether or not a person takes antidepressants. Women suffer from depression more than men. None 26. A chemist successfully synthesized an antimicrobial compound and showed that it effectively killed bacteria. The chemist then repeated this experiment two more times. What was the most likely reason for conducting this experiment three times? To kill the maximum amount of bacteria To synthesize as much compound as possible To minimize researcher bias To demonstrate the reproducibility of the results None 27. A class of students wanted to assess the effects of coffee on test scores. What would be an appropriate control? Drinking coffee during the test Drinking water during the test. Not drinking coffee during the test Drinking coffee immediately after the test None 28. Which of the following is a hypothesis? A procedure that is followed to allow a scientist to conduct a study. A summary of experimental results that typically appears at the end of a research report. A proposed explanation based on observation that is used to conduct further studies. The outcome of a successful experiment. None 29. Japan’s population has been declining in recent years. For this decline, which of the following must be true? Immigration + Deaths = Emigration + Births Deaths + Births > Immigration + Emigration Emigration + Deaths > Immigration + Births Births > Deaths None 30. Dissolved oxygen (DO) is an important indicator of water quality, and oxygen levels that are too high or too low can harm aquatic ecosystems. A biologist noticed that fish were dying in a local lake and was concerned that the DO levels were too low to support aquatic life due to extremely high temperatures that summer. To measure the DO levels, she brought back several lake water samples to her laboratory to measure the DO concentration as a function of temperature. To do this, she heated several samples of lake water to various temperatures and then measured the DO concentration in each sample. Some samples were kept at the outdoors temperature. Why were some samples kept outdoors? To calibrate the thermometer To act as a control group To minimize researcher bias To allow a maximum amount of oxygen to dissolve before measurement None 1 out of 30 Time is Up! Time's up
