Earth's Atmosphere

The layer of gases that surrounds the Earth is called the:

• atmosphere

• biosphere

• hydrosphere

• lithosphere

The air we breathe is made mostly of:

• argon

• carbon dioxide

• nitrogen

• oxygen

How does the ozone layer benefit living things on the Earth.

• We need it to breathe.

• It keeps the Earth cool.

• It is a source of rain.

• It protects the Earth from ultraviolet rays.

Which layer of the Earth's atmosphere does most weather occur?

• mesosphere

• stratosphere

• thermosphere

• troposphere

The source of energy that drives air movement in the atmosphere is the:

• Sun

• Oceans

• Moon

• Ionosphere

The atmospheric layer that is the coldest is the

• mesosphere

• stratosphere

• thermosphere

• troposphere

In what layer of the atmosphere does the Aurora Borealis occur?

• ionosphere

• ozone layer

• stratosphere

• troposphere

The mesosphere helps protect the Earth from:

• Dangerous cosmic rays.

• The impact of meteors.

• The effect of Solar Flares.

• Harmful weather

Which layer of the atmosphere is closest to outer space.

• exosphere

• stratosphere

• thermosphere

• troposphere

What does the temperature do as you go higher up in the troposphere?

• decrease

• increase

• stays constant