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 the model answer of chapter 5 (interactions in ecosystem) {L. 1 & 5}

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DR_SALLY



Posts : 185
Join date : 2010-01-28

PostSubject: the model answer of chapter 5 (interactions in ecosystem) {L. 1 & 5}   Tue Feb 09, 2010 6:58 pm

Chapter five

Interaction in ecosystems

LESSON (1 & 5)

Model answer

Page 15,16

1-complete:

1. Living & non-living

2. biome

3. Plants which make their own food.

4. Plants ,animals.

5. Energy pyramid.

6. Animals.

7. Starch

8. Chlorophyll,sunlight,carbon dioxide.

9. Habitat.

10. biosphere.

11. Community.

12. Ecosystem.

13. Lowest.

14. Omnivore.(consumer)

15. Never

16. Air,soil,water

17. The trees and the land they live on it

18. Wastes,dead organisms.

19. Energy pyramid.

20. Carnivores,omnivores,herbivores.



2-state (T) OR (F):

1. (T)

2. (F) Because carnivores usually eat many kinds of other organisms.

3. (F) Heavy rains.

4. (T).

5. (F) the niche is the role played by the living organism in its ecosystem.

6. (F) the ecosystem.

7. (T)

8. (T)

9. (F) trees help squirrels by giving them food but the squirrels help the trees by spreading their seeds.

10. (T)





3- WHAT WOULD HAPPEN IF:

1. Misbalance will occur in the ecosystem as all organisms depand on water for drinking so the number of population will drop.

2. The population will get smaller.

3. The number of herbivores that depend on these plants will get smaller & then the number of the organisms that depand on these herbivores will drop and the whole energy pyramid will fall.





4-DEFINE:

1. Is a large ecosystem with the same climate and the same organisms.

2. Is made up of all population in one area.
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the model answer of chapter 5 (interactions in ecosystem) {L. 1 & 5}
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