Where you will find the ozone layer.

• stratosphere
• thermosphere
• exosphere
• mesosphere

Where weather occurs.

• stratosphere
• thermosphere
• troposphere
• mesosphere

Where we live.

• stratosphere
• thermosphere
• troposphere
• mesosphere

The hottest layer.

• troposphere
• thermosphere
• exosphere
• mesosphere

What two gases are found throughout all layers of the atmosphere?

• Nitrogen and carbon dioxide
• Nitrogen and oxygen
• Oxygen and carbon dioxide
• Trace gases and water vapor

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

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

What is the function of the ozone layer?

• to allow UV rays to get to Earth
• to block UV rays from getting to Earth
• To keep oxygen in
• to allow meteors to get to Earth

Which layer is the outermost layer?

• troposphere
• thermosphere
• exosphere
• mesosphere

The higher you go, the air becomes _____ _____.

• More dense
• Less dense 

This is the layer where meteors, or shooting stars, burn up.

• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere