1. A given volume of air holds 20 grams of water vapor. At that temperature, the air would be saturated with 80 grams of water vapor. What is the relative humidity?
C. 25%
2. High-altitude, wispy clouds composed of ice crystals may precede a cold front. What type of clouds are these?
C. Cirrus
3. Puffy white clouds in lines or groups at middle altitudes in the sky are what type of clouds?
D. Altocumulus
4. Low rainclouds that form layers or sheets covering the whole sky are what type of clouds?
A. Nimbostratus
5. Thunderheads, rising to great heights and accompanied by thunder and lightning, are what type of clouds?
D. Cumulonimbus
6. If a parcel of air rises, and the amount of water vapor in the air does not change, what will most likely happen to the relative humidity?
A. Increase
7. Rainfall caused by air rising up the slopes of mountains is what type of rainfall?
A. Orographic
8. Worldwide, where would you expect the least amount of precipitation?
C. In the subtropics at about 30 degrees north and south
9. True or False: Collision/coalescence is the precipitation process most likely to be found in the tropics.
A. True
10. Which of the following cloud types would be found at the lowest altitude?
A. Stratus
