What is a true fact about the mesosphere?

• it is the hottest layer
• meteors burn up here
• the ozone layer is found here
• Northern Lights happen here

What does a barometer do?

• measures air pressure
• measures temperature
• measures humidity
• measures length

The weight of the atmosphere is ...

• temperature
• humidity
• air pressure
• weather

How does air pressure change as you climb a mountain?

• it decreases (less air pressure)

• it increases (more air pressure)

• stays the same

• the temperature gets warmer

Elevation, or how high up you are, is also called ...

• altitude
• atmosphere
• height
• decreasing

A layer of air that surrounds Earth to keep us warm is called ...

• atmosphere
• Sun's rays
• ozone layer
• air pressure

Which temperature of air weighs more?

• warm

• cold

What protects Earth from ultraviolet rays from the sun?

• ozone layer

• mesosphere

• air pressure

• troposphere

In which temperature of air do the molecules spread out and take up more space?

• cold

• warm

In what layer would you find the ozone layer?

• troposphere
• stratosphere
• mesosphere
• thermosphere