1. What is evaporation? What is condensation? What is deposition? What is sublimation? For each process, is the energy released or absorbed?

2. Describe the water cycle on Earth with regard to the movement of water into, within, and out of the atmosphere. You should use the proper terminology as presented on the water cycle diagram on the class web page notes. In your description, you should specifically mention where in the cycle energy needs to be added to the water and where energy is released by water.

4. There are three individual questions to answer.

• Explain why drops of liquid water sometimes form on the outside of a glass of ice water. Hint. Glass is a good conductor of heat, which means that the outside of the glass will be close to the temperature of the ice water inside, so assume it is a few degrees above the freezing temperature of water.

• What does this tell you about the dew point temperature of the air surrounding the glass?

• Does the formation of liquid drops on the outside of the glass act to warm or cool the ice water inside the glass? Explain. Hint. Does this process add energy to or remove energy from the surrounding environment?

5. On average, which area of the US experiences the fewest number of thunderstorms per year? Which area of the US experiences the greatest number of thunderstorms per year?

6. What is a cloud? Briefly describe and explain, in your own words, how and why most clouds form. If it helps you may use the concept of an air parcel in your answer.

7. Why do we bother to identify places in the atmosphere where air is forced to rise upward? Why do rising parcels of air (parcels moving upward) cool?

8. What is the difference between a cloud droplet (suspended in a cloud) and a rain drop? Do all clouds produce precipitation? What happens to the cloud droplets that form in clouds that never produce precipitation?