Atmospheric Layers and Circulation

How much of our atmosphere is oxygen?

• 1%

• 5%

• 21%

• 50%

• 78%

What gas makes up 78% of the atmosphere?

• Oxygen

• Nitrogen

• Ozone

• Carbon Dioxide

Where is most of the water vapor in our atmosphere?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

• Exosphere

Which layer of the atmosphere helps us by burning up incoming meteors?

• exosphere

• troposphere

• mesosphere

• thermosphere

As you go higher in the troposphere, the temperature _______________.

• decreases
• increases
• stays the same
• gets very hot

What does the ozone layer do for us?

• keeps us warm

• blocks UV rays from getting to Earth

• keeps oxygen in

• burns up meteors

Which layer is the outermost layer?

• troposphere
• thermosphere
• exosphere
• mesosphere
• magnetosphere

Which layers of the atmosphere have a temperature that INCREASES as the altitude increases? Check all that apply.

• troposphere

• stratosphere

• mesosphere

• thermosphere

Reorder the following layers from the Earth's surface up:

• troposphere

• stratosphere

• thermosphere

• mesosphere

• exosphere

The auroras occur in this layer

• Troposphere

• Mesosphere

• Thermosphere

• Exosphere

• Stratosphere