Atmosphere Basics
Layers of the Atmosphere
Air Pollution Sources
Pollutants
Smog & Acid Rain
100

This is the gaseous layer that surrounds Earth.

atmosphere

100

This layer is closest to Earth’s surface.

Troposphere

100

Vehicles release pollution into the air from this source.

traffic

100

This colorless, odorless gas produced from combustion can be deadly.

CO

100

Smog forms from reactions initiated by this energy source.

Sunlight

200

Air is a mixture of these that make up the atmosphere.

gases

200

Most weather occurs in this layer.

Troposphere

200

Factories and manufacturing contribute to pollution from this source.

Industry

200

These compounds containing carbon participate in photochemical reactions.

VOCs

200

Smog is a mixture of radiation fog and these.

Gaseous Pollutants

300

This force keeps gases close to Earth.

Gravity

300

This layer contains the ozone layer.

Stratosphere

300

Fertilizers and pesticides are pollution sources from this sector.

Agriculture

300

This gas can combine with water vapor to create acid rain.

Sulfur Dioxide

300

Acid rain forms when sulfur oxides mix with this in the atmosphere.

Water Vapor
400

About this percent of the atmosphere is nitrogen.

78%

400

This layer is where meteors burn up.

Mesosphere

400

Burning fossil fuels for electricity is part of this pollution source.

Energy Generation

400

This photochemical oxidant is a major part of smog.

Ozone

400

Acid rain has this type of pH.

low pH

500

About this percent of the atmosphere is oxygen.

21%

500

This outermost layer contains satellites and space technology.

Exosphere

500

Heating homes and using products like paints and cleaners are examples of pollution from this group.

Consumers

500

Tiny particles and droplets in the air are called this type of pollution.

Particulate Matter

500

Photochemical reactions are reactions started by this.

sun