Earths' Atmosphere

In which layer of Earth’s atmosphere does weather occur?

• mesosphere

• stratosphere

• thermosphere

• troposphere

On Mount Everest the temperature decreases as the altitude increases. The summit (highest point) of this mountain is in which atmospheric layer?

• mesosphere

• stratosphere

• thermosphere

• troposphere

The table indicates (shows) the percentages (amount) of some gases in the atmosphere of Mars. Which gas in the atmosphere of Mars is the primary (main) gas found in the atmosphere of Earth?

• carbon dioxide

• nitrogen

• argon

• methane

Some jet airplanes fly in a layer of the atmosphere where temperature generally (mostly) increases with altitude. What is this layer of the atmosphere?

• mesosphere

• stratosphere

• thermosphere

• troposphere

In which layer of the atmosphere does MOST of Earth’s weather occur (take place)?

• the exosphere, which is the outermost layer

• the troposphere, which is the lowest layer

• the thermosphere, which has the highest temperature

• the stratosphere, which contains a sub-layer of ozone

True or False? Air is real.

• False
• True

What two gases make up the majority of air?

• helium & argon
• helium & oxygen
• ozone & nitrogen
• nitrogen & oxygen

Which is proof that air is real?

• Air is invisible.
• Wind moves leaves.
• You cannot see air.

True or false? We need nitrogen gas to live.

• True
• False

Which is not an example of precipitation?

• wind
• rain
• snow
• sleet