Honors Env Sci Chapter 15 Review

What percentage of the atmosphere is composed of oxygen?

• 12 percent

• 21 percent

• 58 percent

• 78 percent

A ratio that compares the amount of water vapor the air contains to the maximum amount that the air could hold at that temperature is

• temperature inversion

• radiation

• relative humidity

• convection

The lowest layer of Earth’s atmosphere, the one directly above the ground, is called the

• troposphere

• stratosphere

• thermosphere

• mesosphere

What is the source of the energy that drives air movement in the troposphere and influences weather and climate?

• ocean

• volcanoes

• ozone layer

• sun

A(n) _____ can trap smog close to the surface. It happens when a layer of cool, dense air stays near the ground and under a layer of warm air.

• temperature inversion

• humidity inversion

• air stagnation

• fog formation

Normal precipitation has a pH of about 5.6. What pH might acid precipitation have?

• 4.6

• 7

• 9.6

• 12.6

Pollutants are removed or changed chemically before they leave factory smokestacks by a(n)

• chlorofluorocarbon.

• scrubber.

• inversion.

• catalytic converter.

Ozone depletion was caused by the following chemicals, which were used in refrigerators and aerosol spray cans.

• catalytic converters

• fossil fuels

• chlorofluorocarbons

• scrubbers

The air you breathe in from the atmosphere is made mostly of

• oxygen.

• carbon dioxide.

• nitrogen.

• argon.

How does the ozone layer benefit living things on Earth?

• provides drinking water in the form of rain

• protects life from the sun’s ultraviolet rays

• is necessary for most living things to breathe

• keeps Earth cool enough for life to survive