Atmosphere

How does carbon monoxide affect human health?

• it interferes with the body's ability to deliver oxygen to cells

• it irritates the throat and air passage

• it helps the respiratory system function more efficiently

• it depletes ozone, causing greater exposure to the sun's rays

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

• troposphere

• stratosphere

• thermosphere

• mesosphere

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

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

• acid deposition

• air mass

• convection current

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

• chloroflurocarbon

• 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

• chloroflurocarbons

• scrubbers

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

What is the source of most air pollution?

• forest fires

• combustion of fossil fuels

• natural processes

• the ozone layer

Which of the following is a provision of the Clean Air Act?

• It sets aside funds for research into pollution control

• It limits the use of motor vehicles

• It lets industries sue people who break the rules

• It prevents states and Native American tribes from developing pollution regulations