ATS/EVS/NSC 113 Name: _____________________________

Quiz 1 Code #: _____________________________

B___ 1. Which of the following is a variable constituent of the atmosphere?

a. oxygen

b. water vapor

c. nitrogen

d. argon

_D__ 2. The Ozone Layer is depleted by ___________ in the atmosphere.

a. methane

b. nitrous oxide

c. carbon dioxide

d. chlorofluorocarbons

_A__ 3. Which of the following is not a source of chlorofluorocarbons?

a. cattle flatulence

b. older refrigerants like Freon

c. blowing agents in Styrofoam manufacturing

d. old propellants in aerosol cans

_B__ 4. During Northern Hemisphere winter, the amount of carbon dioxide in the earth’s atmosphere _____________.

a. increases because the animals that are a sink of CO₂ emit more CO₂ in the winter.

b. increases because the plants that are a sink of CO₂ are dormant in the winter.

c. decreases because the plants that are a source of CO₂ are dormant in the winter.

d. decreases because the sources and sinks of CO₂ are in “dynamic equilibrium”.

_D__ 5. When a car tire is “flat”, a pressure gauge will read “0 PSI”. This means _______.

a. that a barometer inside the tire would read a pressure of 0 millibars

b. that there is a vacuum inside the tire

c. that there is no air inside the tire

d. that the air pressure inside the tire is the same as the air pressure outside the tire

_D__ 6. Average pressure at the earth’s surface is about ____________.

a. 1013 inches of mercury

b. 1013 Pa

c. 1013 PSI

d. 1013 millibars

e. 1013 degrees Celsius