2. 7 th Grade Science Matter and Energy Review

3. A:B: Primary consumersSecondary consumers C:D: SunNone of these #1 Where does the energy in the Producers trophic level come from?

4. C. Sun

5. A:B: omnivoreprey C:D: herbivoredecomposer #2 Organisms that break down the remains of plants and other organisms.

6. D. decomposer

7. A:B: The hawks would decrease, the mice would increase, & the corn would decrease The hawks would increase, the mice would decrease, & the corn would increase C:D: Both of theseNeither of these What would happen in this food chain if a disease killed off most of the snakes? #3

8. A. The hawks would decrease, the mice would increase, & the corn would decrease

9. A:B: The mice, snakes, and hawks would all increase The mice, snakes, and hawks would all decrease C:D: Both of theseNeither of these What would happen if these was no corn in this ecosystem? #4

10. B. The mice, snakes, and hawks would all decrease

11. A:B: Consumers C:D: DecomposersOmnivores Producers #5 What type of organisms are necessary to insure that nutrients are returned to nature?

12. C. Decomposers

13. A:B: Decomposers kill trees as a means of controlling tree populations Decomposers are not necessary for the growth of trees C:D: Decomposers provide trees have important nutrients None of these #6 What important roll do decomposers play in the growth of trees in a forest?

14. C. Decomposers provide trees with important nutrients.

15. A:B: Consumers C:D: DecomposersOmnivores Producers #7 What type of organisms are necessary to insure that nutrients are returned to nature?

16. C. Decomposers

17. A:B: EukaryoticProkaryotic C:D: BothNeither #8 An organism that has a nucleus and organelles.

18. A. Eukaryotic

19. A:B: EukaryoticProkaryotic C:D: BothNeither #9 An organism that does not have a nucleus and organelles.

20. B. Prokaryotic

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