The Atmosphere

A mixture of gases that surrounds Earth is 

• altitude.
• the atmosphere.
• thermosphere.
• climate.

The Earth is made up of mostly

• nitrogen.
• oxygen.
• carbon dioxide.
• water vapor.

Air pressure is ____________ at the Earth's surface because more air is above you.

• weakest
• smallest
• strongest
• biggest

All of the layers of the atmosphere have ________ in common.

• atmo-
• -es
• pre-
• -sphere

The __________ is the layer of the atmosphere where we live.

• Troposphere
• Mesosphere
• Stratosphere
• Thermosphere

The stratosphere is the home of the ________ ____________ .

• purple minions
• ozone layer
• space aliens
• human beings

The coldest layer is the 

• troposphere.
• stratosphere.
• mesosphere.
• thermosphere.

The uppermost layer is the

• thermosphere.

• stratosphere.

• mesosphere.

• exosphere.

It takes approximately _____ minutes for the energy to travel to Earth to warm your face.

• 18
• 8
• 28
• 800

____% of energy is absorbed by Earth's surface.

• 25
• 20
• 5
• 50