The contamination of the atmosphere by pollutants and natural sources is called __________ __________.

• air pollution

• atmosphere

• greenhouse gas

• pollutant

• pollution

__________ is the release of harmful substances into the environment.

• air pollution

• atmosphere

• greenhouse gas

• pollutant

• pollution

A __________ is any harmful substance that is put into the environment.

• air pollution

• atmosphere

• greenhouse gas

• pollutant

• pollution

A __________ __________ is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range.

• air pollution

• atmosphere

• greenhouse gas

• pollutant

• pollution

The ____________________ is a mixture of gases that surrounds the Earth.

• air pollution

• atmosphere

• greenhouse gas

• pollutant

• pollution

Which of the following is a source of pollution in the environment?

• acid rain

• fumes from cars

• smoke from factories

• all of these

A person painting his house dumps the unused paint on the GROUND. Which of the following resources will this most likely pollute?

• solar energy

• GROUND water

• wild life

• air

Wind turbines are becoming an increasingly popular method of generating a community’s electricity. In wind turbines, wind is used to power electric generators. How will an increase in the use of wind turbines affect the availability of wind in the future?

• They will decrease the availability of wind.

• They will pollute the wind, making it unsafe to use.

• They will not affect the availability of wind.

• They will increase the availability of wind.

Which gas is the most abundant in the atmosphere?

• other gases

• oxygen

• nitrogen

Which gas is the second most abundant in the atmosphere?

• other gases

• oxygen

• nitrogen