1. As air rises the windward side of a mountain ridge, the air's temperature decreases. Which process usually causes this temperature to decrease?
2. What atmospheric variable usually increases before precipitation occurs?
3. The relative humidity is 100% when:
a. the atmosphere is relatively dry
b. the air is at its saturated vapor pressure
c. the air pressure is high
d. transpiration equals evaporation
3. Under what set of atmospheric conditions does water usually evaporate the fastest?
a. warm temperature, calm winds, high humidity
b. warm, high winds, low humidity
c. cold, calm winds, low humidity
d. cold, high winds, high humidity
5. Clouds usually form when moist air rises because the air..
a. contracts and cools
b. contracts and warms
c. expands and cools
d. expands and warms
Please help! I don't understand this. I have no book to get reference from, there were 15 questions, I got ten, but I just don't understand these.
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