1. During a clear, calm day, the relative humidity would tend to _______ from sunrise to early afternoon?
a. Increase
b. Decrease
c. Remain constant
d. It is impossible to determine
answer: b
2. In which of the following situations is the amount of water vapor in the atmosphere the highest?
a. When the relative humidity is 50 percent
b. When the relative humidity is 70 percent
c. When the relative humidity is 90 percent
d. We cannot tell without knowing the temperature in each situation
e. The amount of water vapor in the atmosphere is the same for all of these situations
answer: d
3. Adiabatic temperature changes occur as a result of:
a. The addition or removal of heat energy to an air parcel from the surrounding atmosphere
b. Changes in the humidity of the air parcel with the surrounding atmosphere
c. A rising parcel of air cooling through expansion or a sinking parcel warming through compression
d. Heating from the surface of the Earth
answer: c
4. What kind of weather conditions prevail when a large difference exists between the dry- and wet-bulb temperature readings?
a. Dry
b. Hot
c. Cold
d. Humid
e. Only b and d
answer: e