Atmosphere

What gas makes up most of the Earth's atmosphere?

• Oxygen

• Carbon dioxide

• Argon

• Nitrogen

What might happen if the earth didn't have an atmosphere?

• Everything would go flying off into space

• We wouldn't be able to breathe

• The earth's rotation would stop

• The seasons would be longer

Which answer orders the atmospheric layers correctly, from the lowest to highest.

• Exosphere, Troposphere, Stratosphere

• Stratosphere, Exosphere, Troposphere

• Troposphere, Stratosphere, Exosphere

• Troposphere, Exosphere,

  Stratosphere,

Why is it difficult to breathe at high altitudes?

• Because you are closer to the sun the higher you go.

• Because atmospheric gases become thinner the higher you go

• Because there is more carbon dioxide the higher you go

• Because there is no oxygen in the troposphere

If you wanted to fly through a cloud, which atmospheric layer would you fly through?

• The troposphere

• The mesosphere

• the ionosphere

• the exosphere

Which of the following is a true statement about the stratosphere?

• The temperature gets warmer the higher you go up

• The temperature gets colder the higher you go

• There is more oxygen the higher you go

• There is more carbon dioxide the higher you go

Why is the ozone layer so important?

• Because it traps most of the sun's heat

• Because it contains most of earth's oxygen

• Because it blocks harmful ultraviolet rays

• Because it allows ultraviolet rays to warm the stratosphere

Which term accurately describes the mesosphere?

• Extremely cold

• Extremely warm

• Extremely low

• Extremely high up

In the name "thermosphere," the prefix "thermo-" refers to what?

• Atmospheric gases

• Altitude

• Meteors

• Heat

Which regio of the atmosphere is filled with charged particles?

• The troposphere

• The mesosphere

• The ionosphere

• The ozone layer