1. How does the fact that the Earth is a sphere tilted on its axis influence the distribution of life?

2. Describe the zones of a(n):

3. What are the sources of energy in the various zones of the ocean?

4. List adaptations that enable organisms to survive conditions in the following biomes:

5. How can the tropical rain forest support diverse and abundant life with such poor soil?

6. What is permafrost?

7. How does photosynthetic activity differ in the zones of a lake?

1. Compare and contrast the challenges that alternating dry and wet conditions pose to organisms living in:

2. Distinguish between vertical stratification and thermal stratification.

3. What do fall and spring turnover and upwelling have in common? How do they differ?

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