1st Hr. Ch15 Atmosphere Learning Targets

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

In which main layer of Earth's atmosphere does most weather occur?

• thermosphere

• mesosphere

• troposphere

• stratosphere

Radiation, conduction, and convection are the three main methods of

• calculating relative humidity

• Modeling climate

• measuring air pressure

• transferring heat

Substances, such as smoke and carbon monoxide, released into the air are called

• fossil fuels

• scrubbers

• air masses

• emissions

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

A device in a motor vehicle that reduces the amount of air pollutants in emissions is a(n)

• catalytic converter

• scrubber

• chlorofluorocarbon

• inversion

The ozone hole was located primarily above

• Montreal, Canada

• Antarctica

• Alaska

• The United States

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

• catalytic converters

• fossil fuels

• chlorofluorocarbons

• scrubbers

What percentage of the atmosphere is composed of oxygen?

• 12 percent

• 21 percent

• 58 percent

• 78 percent