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Food Chains & Webs Review-H 7th Grade Environmental Science Mrs. Krempa Name __________________________________________ Date & Section __________________________________ Answer the following questions without looking at your notes! You must go through ALL of the questions at least once! Circle the number to the questions you don’t know or are unsure of, then look up the correct answer in your notes! All of this information is fair game for your test! 1. Name & briefly describe the three basic energy roles in an ecosystem. For each role, give an example of an organism that plays that role. a. _________________________________________________________________________________ Example ___________________________________ b. _________________________________________________________________________________ Example ___________________________________ c. _________________________________________________________________________________ Example ___________________________________ 2. Describe the relationship between a food chain, food web and energy pyramid. How are they different? The same? ______________________________________________________________________________________________________________________________ ______________________________________________________________________________________________________________________________ ______________________________________________________________________________________________________________________________ 3. Which is better, a food chain or a diverse food web? Why? ______________________________________________________________________________________________________________________________ ______________________________________________________________________________________________________________________________ 4. What does a biomass pyramid show? What do these pyramids determine? ______________________________________________________________________________________________________________________________ ______________________________________________________________________________________________________________________________ 5. Where would you place a decomposer on a food web? Why would you place them there? ______________________________________________________________________________________________________________________________ ______________________________________________________________________________________________________________________________ 6. What is the synonym for producer? __________________________________________________________ 7. What is the synonym for consumer? _________________________________________________________ 8. What do consumers control in a system? ______________________________________________________ 9. What is synonym for trophic level? _______________________________________________________ 10. Define producer. List two examples. Definition ___________________________________________________________________________ Example __________________________________ Example __________________________________ 11. Define primary consumer. List two examples. Definition ___________________________________________________________________________ Example __________________________________ Example __________________________________ 12. Define secondary consumer. List two examples. Definition ___________________________________________________________________________ Example __________________________________ Example __________________________________ 13. Define tertiary consumer. List two examples. Definition ___________________________________________________________________________ Example __________________________________ Example __________________________________ 14. What is detritus? _______________________________________________________________________ ____________________________________________________________________________________ 15. What is the name of the process plants use to make their own food? _______________________________ 16. List two examples of the following consumers… herbivore _______________________________ carnivore _______________________________ _______________________________ _______________________________ Omnivore ______________________________ _______________________________ scavenger _______________________________ _______________________________ 17. Fill in the Energy Pyramid below. Include numbers (calorie or percent), an organism at each level and label each level as producer, primary consumer, secondary consumer or tertiary consumer. 18. Use the food web below to answer the following questions. a. List two primary consumers from this web. __________________________________________ __________________________________________ b. List two secondary consumers from this web. __________________________________________ __________________________________________ c. List two tertiary consumers from this web. __________________________________________ __________________________________________ d. List a decomposer from this web __________________________________________ e. List one organism that could be placed at more than one level in this food web. Identify what levels they could be on. Organism ___________________________________________________________ Levels _____________________________________________________________ f. What potential consequences are there if the mouse were removed from this food web? _____________________________________________________________________________________________________________________ _____________________________________________________________________________________________________________________ g. List two pairs of organisms that may compete with each other. What would they compete for? Pair _____________________________ Compete for_______________________________ Pair _____________________________ Compete for_______________________________ Thrush Acorn 19. Draw two chains from the web above. Label each organism as producer, primary consumer, secondary consumer or tertiary consumer. Use the back of this paper. !9. Draw two chains from the web on the other side of this page. Label each organism as producer, primary consumer, secondary consumer or tertiary consumer. Include arrows!! 20. Use energy stored in hydrogen sulfide to convert CO2 and water into sugar. A. chemosynthesis B. photosynthesis C. heterotroph 21. Organisms that rely on other organisms for energy and nutrients. A. producer B. consumer C. decomposer 22. break down plant/animal tissues into simple substances (nutrients) through digestion. A. producer B. consumer C. decomposer 23. Regulate speed at which nutrients turn over in a system. A. producer B. consumer C. decomposer 24. Chemically breaks down nonliving matter and recycle (return) nutrients to soil for plant use. A. producer B. consumer C. decomposer 25. A special type of decomposer that scavanges (eats) nonliving organic matter. A. detritivore B. detritus C. decomposer 26. Linear series of feeding relationships. A. food chain B. food web C. energy pyramid 27. A diagram of feeding relationships and energy flow showing the paths by which nutrients and energy pass from organism to organism as one consumes another. A. food chain B. food web C. energy pyramid 28. An organism’s rank in a feeding hierarchy. A. trophic level B. energy level C. eating level 29. A diagram that shows the amount of energy that passes from one trophic level to the next. A. biomass pyramid B. food web C. energy pyramid 30. Total amount of living tissue a trophic level contains. A. biomass B. food web C. energy pyramid
