Harmful substances in the air, water, and on land are called:

Which layer of the atmosphere is at the bottom and we live in it?

What layer burns out the meteors before they reach Earth?

Satellites orbit in this layer of the atmosphere:

Which layer contains clouds and weather?

The outermost layer that mixes with space is the:

Which layer of the atmosphere has the ozone layer?

Auroras, such as the Northern Lights, form in this layer of the atmosphere:

The prefix "EXO" in exosphere means:

The prefix "THERM" in thermosphere means:

A brownish haze that is a mixture of ozone and other chemicals, formed when pollutants react with each other in the presence of sunlight:

Which gas is a type of pollution in the troposphere, but needed in the stratosphere to protect against UV radiation from the sun?

The layer with the MOST air density is:

The layer with the LEAST air density is:

Bottom of the thermosphere is called:

The ozone layer is a separate layer of the atmosphere.

Airplanes fly in the TROPOSPHERE.

How does the ozone layer protect Earth?

What two things make up SMOG? (Check all that apply.)

Forest fires can lead to air pollution.

What happens to temperature as you increase altitude in the troposphere?