Air Pollution and Humidity Quiz 2

What is air pollution?

• Clean air with no particles

• The addition of harmful substances to the atmosphere

• Pure oxygen in the atmosphere

• Rain mixed with clean air

What are primary pollutants?

• Pollutants created by chemical reactions in the air

• Pollutants that come directly from a source

• Harmless substances in the air

• Pollutants that only exist indoors

Which of the following is an example of a primary pollutant?

• Smog

• Acid rain

• Carbon monoxide

• Ozone

What is smog mainly composed of?

• Clean air and water vapor

• Dust and sand

• Smoke and fog

• Oxygen and nitrogen

Which type of pollutant is created when primary pollutants react with other substances?

• Secondary pollutants

• Primary pollutants

• Clean air particles

• Oxygen molecules

How do humans contribute to air pollution?

• Planting trees

• Burning fossil fuels

• Cleaning the environment

• Increasing fresh air circulation

What are the main sources of indoor air pollution?

• Open windows

• Mold, smoke, and chemicals

• Air conditioning

• Outdoor pollution entering the house

What causes acid precipitation?

• Too much carbon dioxide in the air

• Pollutants from burning fossil fuels mixing with water vapor

• Rain falling during summer

• Water evaporating too quickly

What can acid rain damage?

• Only human lungs

• Soil, buildings, and aquatic life

• The sun's radiation

• The moon's surface

What is the ozone hole?

• A natural gap in the ozone layer

• A thinning area of the ozone layer caused by chemicals

• A hole that lets in fresh air

• A hole created by volcanoes