READ: Bio Cycles

Lesson Review Questions

Recall

1. What is a biogeochemical cycle? Name an example.

2. Identify and define two processes by which water naturally changes from a solid or liquid to a gas.

3. Define exchange pool and reservoir, and identify an example of each in the water cycle.

4. State three ways that carbon dioxide enters Earth’s atmosphere.

5. List all the ways that a single tree may be involved in the carbon cycle.

Apply Concepts

6. Assume you are a molecule of water. Describe one way you could go through the water cycle, starting as water vapor in the atmosphere.

7. Read the following passage, then apply information from the lesson to explain why the farmer plants peas:

A farmer has three fields in which she grows corn for market. Every year, she plants one of the fields with peas, even though she cannot make as much money selling peas as she can selling corn. She rotates the fields she plants with peas so that each field is planted with peas every 3 years.

Think Critically

8. Compare and contrast biological and geological pathways of the carbon cycle.

9. Explain why bacteria are essential parts of the nitrogen cycle.

Points to Consider

In this lesson, you read how matter is recycled through ecosystems. Ecosystems vary in the amount of matter they can recycle. For example, rainforests can recycle more matter than deserts.

• Consider the abiotic and biotic factors of a rainforest and desert. How might they be different?
• Why do you think a rainforest can recycle more matter than a desert?

CK-12 Foundation, Biology. http://creativecommons.org/licenses/by-nc-sa/3.0/