Coldest layer, meteors burn up in this layer

• troposphere
• stratosphere
• mesosphere
• thermosphere

The coldest layer.

• troposphere
• thermosphere
• exosphere
• mesosphere

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

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

This is the layer where most airplanes fly.

• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere

What happens to the density (thickness)/ air pressure of the air as you increase in altitude?

• density increases
• density decreases
• density stays the same
• density disappears

The higher you go, the air becomes.......

• More dense
• Less dense 

Which is a main source of energy that drives the Earth system?

• energy of moving water
• oil from inside earth
• gases in the atmosphere
• heat from the sun

The atmosphere keeps the Earth...

• Warm enough for life
• Too Cold for Life
• Spinning
• Orbiting the sun

Where you will find the ozone layer.

• stratosphere
• thermosphere
• exosphere
• mesosphere

Where weather occurs.

• stratosphere
• thermosphere
• troposphere
• mesosphere