PreACT Domain 4: Science Welcome to your PreACT Domain 4: Science 1. PreACT: Science What property of water is primarily responsible for its high specific heat capacity, which affects climate and weather systems worldwide? Covalent bonding Hydrogen bonding Ionic bonding Van der Waals forces None 2. PreACT: Science During photosynthesis, what is the main purpose of chlorophyll in the chloroplasts of plant cells? To absorb sunlight To release oxygen To produce glucose To consume carbon dioxide None 3. PreACT: Science In an ecological food chain, what role do decomposers play in an ecosystem? Primary producers Primary consumers Secondary consumers Recyclers of nutrients None 4. PreACT: Science What type of biome would you expect to find at a latitude characterized by cold temperatures and low precipitation levels? Tropical rainforest Temperate deciduous forest Desert Tundra None 5. PreACT: Science Which gas is the most abundant in Earth's atmosphere and crucial for the formation of amino acids and proteins in living organisms? Oxygen Carbon dioxide Nitrogen Helium None 6. PreACT: Science In the context of plate tectonics, what is the significance of subduction zones? They are where new crust is created. They are where crust is destroyed. They are stable boundaries without seismic activity. They signify the splitting of a continent. None 7. PreACT: Science Which principle explains why all particles in motion have a wave-like behavior? Heisenberg Uncertainty Principle Principle of Relativity De Broglie Hypothesis Newton's First Law of Motion None 8. PreACT: Science What is the primary cause of genetic mutations in DNA sequences? Cellular respiration Photosynthesis Protein synthesis Errors in DNA replication None 9. PreACT: Science Which layer of the Earth is liquid and responsible for the creation of the magnetic field? Crust Mantle Outer core Inner core None 10. PreACT: Science Which process is primarily responsible for the global distribution of water from oceans to land? Condensation Evaporation Precipitation Transpiration None 11. PreACT: Science In a stable ecosystem, which type of species would you expect to have the smallest population? Producers Primary consumers Secondary consumers Tertiary consumers None 12. PreACT: Science What is the primary effect of ultraviolet (UV) radiation on human skin cells? It accelerates the synthesis of Vitamin D. It causes tanning by increasing melanin production. It can lead to DNA damage and mutations. It enhances the immune system. None 13. PreACT: Science What does the pH scale measure? Salinity of a solution Hydrogen ion concentration in a solution Oxygen levels in water Nitrogen content in soil None 14. PreACT: Science Which element is most essential for the formation of chlorophyll in plants? Nitrogen Phosphorus Magnesium Iron None 15. PreACT: Science What is the effect of increasing altitude on air pressure and temperature? Both increase Both decrease Pressure decreases, temperature increases Pressure decreases, temperature decreases None 16. PreACT: Science In genetics, what is the purpose of a Punnett Square? To determine the genetic makeup of an individual To predict the outcomes of genetic crosses To identify genetic mutations To measure genetic diversity in a population None 17. PreACT: Science Which of the following best describes the role of enzymes in biological reactions? They increase the overall energy change of the reaction. They decrease the activation energy required to start the reaction. They alter the final products of the reaction. They increase the temperature at which a reaction occurs. None 18. PreACT: Science Which type of bond is formed by the sharing of electrons between atoms? Ionic bond Covalent bond Metallic bond Hydrogen bond None 19. PreACT: Science What is the primary consequence of the ozone layer depletion? Decrease in sea level Increase in global temperatures Increase in ultraviolet radiation reaching the Earth Decrease in carbon dioxide in the atmosphere None 20. PreACT: Science In an ecological pyramid, what is the typical efficiency of energy transfer from one trophic level to the next? Less than 10% About 25% Roughly 50% Over 75% None 21. PreACT: Science What gas do plants primarily take in for photosynthesis? Oxygen Carbon dioxide Nitrogen Argon None 22. PreACT: Science What geological process is responsible for the formation of mountains? Erosion Sedimentation Tectonic plate movement Volcanic activity None 23. PreACT: Science In terms of cell biology, what is a lysosome's primary function? Protein synthesis DNA replication Breakdown of cellular waste Photosynthesis None 24. PreACT: Science Which phenomenon explains why a spoon appears bent when placed in a glass of water? Diffraction Reflection Refraction Polarization None 25. PreACT: Science What is the primary function of the white blood cells in the human body? To carry oxygen To clot blood To fight infections To regulate water balance None 26. PreACT: Science Which of these elements is essential for the transmission of nerve impulses? Carbon Iron Sodium Zinc None 27. PreACT: Science What term describes the movement of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration? Diffusion Osmosis Active transport Filtration None 28. PreACT: Science What is a likely environmental impact of increased levels of carbon dioxide in the atmosphere? Decreased ultraviolet radiation absorption Increased global temperatures Reduced ocean acidity Lowered sea levels None 29. PreACT: Science Which type of rock is formed by the cooling and solidification of magma or lava? Metamorphic Sedimentary Igneous Quartz None 30. PreACT: Science What is the main reason for the phases of the Moon? The Moon's rotation on its axis The Moon's orbit around the Earth The Earth's shadow on the Moon The Sun's movement around the Galaxy None 1 out of 30 Time is Up! Time's up
