1. Describe the origin of gases in the atmosphere, including nitrogen gas, CO2, and oxygen.

2. Describe trends in CO2 over the 20th century, including both seasonal and long-term patterns and the processes that cause them.

3. Tell how human activities have altered the atmosphere and land cover in ways that have had both warming and cooling effects on the climate.

4. Rank the importance of each of the following in changing the Earth's radiation budget: a. Changes in sun's output b. Changes in albedo c. Changes in greenhouse gases.

5. Rank the following gases in terms of their abundance in the atmosphere: a) CO2 b) N2 c) O2.

6. List the four processes that keep water (and places near water, like the coasts) cooler than inland locations in the summer.

7. Tell why coastal areas are often warmer than inland locations during the winter.

8. Tell how urbanization can affect air temperatures in a forested region and in a desert region.

9. Given a map showing different locations, identify which locations are likely to have the largest seasonal difference in temperature, and explain why.

10. Describe the role of ocean circulation in keeping England warmer than other land masses at the same latitude.

11. Given a map of the spatial distribution of temperature, identify the approximate month of the map (e.g. June, January, etc).

12. Tell why temperature changes with altitude or elevation.