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

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 what layer would you find the ozone layer?

• troposphere
• stratosphere
• mesosphere
• thermosphere

What layer comes next:
Troposphere - 
stratosphere -
?????

• mesosphere
• exosphere
• thermosphere
• ionosphere

What gas makes up the majority of the atmosphere?

• oxygen

• nitrogen

• water vapor

• carbon dioxide

In what layer of the atmosphere would you find clouds and weather?

• troposphere
• stratosphere
• mesosphere
• thermosphere

Lifting occurs when mountains push air

• up

• down