Answers to Recent Work for Ecosystems

Chapter 3 Quiz

1. B
2. B
3. A
4. D
5. D
6. C
7. D
8. D
9. B
10. D
11. E
12. G
13. A
14. B
15. D
16. C

17. Decomposers are important in primary succession because they are able to break down dead leaves and organisms and create soil

18. Flooding results in soil erosion and soil pollution if toxic chemicals were mixed with flood waters. Flooding can also spread diseases in the water.

19. Leaving fields bare can cause soil erosion. Soil compaction from farm machinery and grazing animals causes reduction in air spaces, which makes soil less healthy.

Chapter 3 Booklet
p. 43 - Assessment Section 3.1


1. B
2. A
3. D
4. E
5. C
6. D
7. D
8. C
9. B

p. 49 - Assessment Section 3.2


1. B
2. D
3. G
4. E
5. F
6. A
7. C
8. A
9. D
10. A
11. B

p. 55 - Assessment Section 3.3


1. E
2. A
3. G
4. D
5. B
6. F
7. C
8. A
9. D
10. B
11. D
12. C