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Name ______________________ Pd/Class Color _____________ Date _________ Weekly Test # 6 Energy Flow and Cycles of Matter Direction: Carefully read the test questions and apply Reading and test taking strategies on each one of them. 1. Which of these correctly shows the amount of heat energy lost into the environment as heterotrophs breakdown the chemical energy they get from their food source? A. 15% B. 78% C. 10% D. None of these apply 2. How much amount of nitrogen gas makes up the atmosphere part of the earth? E. 10% F. 15% G 78% H. 100% 3. Nitrogen gas is an abundant gas on earth. Which of the following statements describes the importance of nitrogen gas? A. it is used for photosynthesis in plants B. it is used by heterotrophs to make their own food C. it is valuable for plants growth D. it is used by decomposers to make their own food 4. Which of these correctly describes autotrophs? They are E. organisms that eat other organisms for energy F. organisms that eat meat G. organisms that eat primary consumers H. organisms that make their own food from radiant energy. 5. Which of the following is responsible for the nitrogen cycle on earth? A. producers B. consumers and producers C. decomposers D. carnivores 6. Which of the following is a specific example of organism responsible for the oxygen cycle on earth? F. rabbit H. sunflower G. eagle I. bacteria 7. Carbon dioxide cycle on earth is cause byA. plants B. animals and plants C. animals and humans D. decomposers and plants 8. Water cycle on earth is caused mainly by which of the following? F. the thermal energy from the sun G. the chemical energy stored in food H. the mechanical energy from the wind I. the mechanical energy of the water 9. During the nitrogen cycle, a plant converts the nitrates from the soil intoA. fat B. protein C. carbohydrates D. fertilizer 10. What is the process by which bacteria return nitrogen gas to the atmosphere? F. reproduction G. excretion H. nitrogen fixation I. denitrification 11. During denitrification process, what happens to the amount of nitrogen in the Soil? The amount of nitrogen willA. increase as some of the nitrogen gas will be release into the atmosphere B. decrease as a good amount of it will go to the atmosphere C. increase as the nitrogen gas will never run out D. none of these apply 12. Many types of organisms in a compost heap obtain their nutrition from dead plants and animals and in turn, recycle elements such as carbon and nitrogen. These organisms areE. producers F. herbivores G. carnivores H. bacteria 13. Oxygen makes up- _________ of the atmosphere. A. 10% B. 1% C. 21% D. 78% 14. Which of these is a primary producer? F. deer G. zooplankton H. coyote I. phytoplankton 15. Which of the following is an organic molecule? A. CaO2 B. C6 H12 O6 C. H2O D. NH3 16. Which of the organisms is a parasite? E. mockingbird F. snake G. tapeworm H. great horned owl 17. Which of the organisms is a predator? A. mountain lion B. rabbit C. tapeworm D. grasshopper 18. In a marine ecosystem, which of the organisms would get energy directly from the sun? F. crab G. algae H. trout I. turtle Use the diagram below to answer questions 19-20 19. In the grassland food web above, what would happen to the willow plant if the rabbit population in this environment will disappear? The population of willow plant will- A. increase B. decrease C. remain the same D. be extinct 20. Create a Food/Energy Pyramid showing the accurate kind of organism/s for each trophic level. Describe what happens to the amount of energy from one trophic level to the next.
