Sources: PowerPoint, Web, text (p. 9-12)

1. What is a desert?

2. What is the ratio of potential evapotranspiration to precipitation called? What is it here?

3. What 5 major factors affect potential evapotranspiration?

4. What 3 major factors affect temperature?

5. Does hot air go up or down? Does cold air go up or down?

6. When air rises, what happens to its temperature? When air sinks, what happens to its temp?

7. Does warm air or cold air potentially hold more water?

8. What is the difference between absolute and relative humidity?

9. When the air temperature cools, what happens to the relative humidity of the air? heats?

10. When air rises, what happens to the relative humidity of the air? When air falls?

11. When air rises, is it more or less likely to rain? When air descends?

12. What is dew point?

13. When the dew point increases, is it more or less or equally as likely to rain?

14. Where does our rain here in Tucson come from in the winter? in the summer?

15. What are the three causes of precipitation?

16. What causes the seasons?

17. What causes it to be cooler in the southwest during the winter and warmer in the summer?

18. What are the four major causes of deserts?

19. Be able to draw the convection cells in Earth's atmosphere (Hadley, Ferrel, and Polar) and the prevailing wind directions and ocean currents.