1. Of the following gases, the most abundant in theatmosphere is
A. oxygen.
B. nitrogen.
C. carbon dioxide.
D. argon.
2. Weather phenomena such as clouds and storms are found inthe
A. thermosphere.
B. stratosphere.
C. troposphere.
D. ionosphere.
3. The highest of the following is/are:
A. the summit of Mt. Everest.
B. cirrus clouds.
C. the ozone layer.
D. the ionosphere.
4. Atmospheric pressure is half its sea-level value at analtitude of
A. 1 km (3300 ft).
B. 5 km (16,400 ft).
C. 20 km (12.4 mi).
D. 100 km (62 mi).
5. Average atmospheric pressure does not correspondto
A. 1013 mb.
B. 1.013 N/m2.
C. 101.3 kPa.
D. 14.7 lb/in.2.
6. The ozone in the stratosphere
A. reflects radio waves.
B. reflects solar ultraviolet radiation.
C. absorbs solar ultraviolet radiation.
D. is responsible for the blue color of the sky.
7. The breakdown of the ozone layer is promoted by theemission into the atmosphere of
A. carbon dioxide from the burning of fossil fuels.
B. sulfuric acid from the burning of fossil fuels.
C. unburned hydrocarbons in the exhausts of gasolineengines.
D. chlorofluorocarbon (CFC) gases used in refrigeration.
8. Temperatures in the stratosphere increase with altitudebecause of the presence there of
A. water vapor.
B. ozone.
C. pollutants.
D. CFCs.
9. A temperature inversion that acts to trap smog inlocalities such as Los Angeles consists of
A. cold air above a layer of warm air.
B. warm air above a layer of cold air.
C. dry air above a layer of moist air.
D. moist air above a layer of dry air.
10. Saturated air has a relative humidity of
A. 0.
B. 1%.
C. 50%.
D. 100%.
11. When saturated air is warmed,
A. it becomes able to take up more water vapor.
B. some of its water content condenses out.
C. the relative humidity goes up.
D. snow begins to fall.
12. The lower the temperature of a volume of air,the
A. more water vapor it can hold.
B. less water vapor it can hold.
C. greater its possible relative humidity.
D. lower its possible relative humidity.
13. When the temperature of a volume of air is equal to itsdew point, the relative humidity of the air is
A. 0.
B. 50%.
C. 100%.
D. 200%.