Describe the composition of the atmosphere.

Description should include

• layers of the atmosphere
• gases and components that make up the atmosphere.

Process/Skill Questions:

• What are the most common gases in the atmosphere?
• What are the four layers of the atmosphere?
• What is water vapor’s role in the atmosphere?
• Where is the concentration of gases the densest? What is ozone?
• How do chlorofluorocarbons affect the ozone layer of the Earth?
• How can one protect oneself from ultraviolet rays?
• What human activities cause ozone depletion?