Earth's Atmosphere

True or false? Air is a force.

• true
• false

True or False? Air is real.

• False
• True

Fill in the blank: A syringe ___________ air in the chamber when the plunger is pushed.

• pressure
• pulls
• compresses
• shortens

What two gases make up the majority of air?

• helium & argon
• helium & oxygen
• ozone & nitrogen
• nitrogen & oxygen

True or False? Air has no mass.

• True
• False

Which is proof that air is real?

• Air is invisible.
• Wind moves leaves.
• You cannot see air.

True or False? Air takes up space.

• True
• False

Which layer of the atmosphere is where most weather happens?

• Troposphere
• Exosphere
• Stratosphere
• Mesosphere

When air particles are compressed, they ____________.

• get further apart
• do not move
• get pushed together
• explode

True or false? We need nitrogen gas to live.

• True
• False