Cycles of Matter Content Practice B LESSON 2 1.

Name
Date
Content Practice B
Class
Chapter 20
LESSON 2
Cycles of Matter
Directions: Answer each question or respond to each statement on the lines provided.
1. Explain what a cycle is.
2. What are the three processes in the water cycle?
3. About how much of Earth’s water is salt water in the oceans?
4. How do clouds form?
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5. What is nitrogen fixation?
6. What is photosynthesis?
7. What gas is produced as a by-product in photosynthesis?
8. Explain the greenhouse effect.
Matter and Energy in the Environment
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