Primary air pollutants react chemically with other substances and produce new substances called:

The release of products of combustion into the air often causes the formation of ozone near the surface of Earth. This ground-level ozone damages plants and affects their ability to absorb carbon dioxide. What most likely caused the doubling of ground-level ozone since 1850?

Fossil fuels are _____________-containing fuels that formed millions of years ago from organisms.

The release of primary air pollutants, such as carbon monoxide, VOCs, and particulate matter can lead to:

The environmental effects of acid precipitation, like acid rain, include all the following EXCEPT:

The Clean Air Act reduces ___________ of pollutants that harm human health and lead to environmental problems.

Due to regulations put in place by the Clean Air Act of 1970, data about the 5 major pollutants in the United States shows that the levels of these pollutants in the air have:

A _______________ decreases pollution emissions from motor vehicles.

Secondary air pollutants include ozone and acids.

Most air pollution is the direct or indirect result of the combustion (burning) of fossil fuels.

The body system MOST LIKELY to be affected by air pollutants is the nervous system.

Air quality is usually the best in developing nations, where there is less pollution and better technology.

Brownish-orange haze formed by chemical reactions involving sunlight, nitrogen oxide, and hydrocarbons.

A natural process in which certain gases in the atmosphere trap heat near the surface of the Earth and prevent it from radiating into space.

The 3 main factors that influence Earth’s climate are: the sun, global wind patterns, and _____________.

The oceans affect climate by transporting heat and absorbing _________________.

During a/an _________________ event, surface water becomes warmer than usual in the Pacific Ocean, which causes rain storms and flooding in typically dry areas of land.

According to this graph, what can scientists determine about the relationship between atmospheric CO₂ and temperature?

Average temperatures on Earth have ____________________ between the years 1906-2005.

___________________________ increase(s) the possibility that saltwater may contaminate freshwater supplies, like rivers.

If Earth did not have an atmosphere, then most of the energy from the sun would be reflected back into space, leaving the surface of Earth too cold to sustain life.

Deforestation does not have an effect on climate, because plants and trees cycle CO₂ out of the atmosphere.

This is a naturally occurring process that helps sustain life on Earth, but it is worsening because of human activities, such as burning fossil fuels that add CO₂ into the atmosphere.

A substance, such as water vapor, methane, or carbon dioxide that absorbs heat and releases it slowly.

An example of a proxy indicator, which is a type of indirect evidence that scientists use to study what the atmosphere was like in the past.

An increase in Earth’s average surface temperature.

What is the difference between climate change and air pollution?

What is the main cause of the depletion of the ozone layer in the Earth's stratosphere?

Which of the following is a consequence of global warming that affects polar regions?