1.  The gas found in the largest amount in the troposphere is

• Oxygen

• Nitrogen

• Argon

• Carbon Dioxide

There is more air pressing down at sea level than in the mountains, which leads to

• Greater atmospheric pressure

• Lower atmospheric pressure

• There is no difference in atmospheric pressure

What tool is used to measure air pressure?

How are the layers of the atmosphere determined?

• By changes in atmospheric pressure.

• By changes in atmospheric gases.

• By changes in temperature.

• By changes in magnetism.

Arrange the layers of the atmosphere from closest to the earth's surface (1) to furthest from the earth's surface (5).

• Troposphere

• Exosphere

• Stratosphere

• Mesosphere

• Thermosphere

How did the appearance of green algae and plants affect the early atmosphere?

Tags

NGSS.MS-LS1-6

Match the layer of the atmosphere with the phrase that best describes it.

• Where satellites are found

• Thermosphere

• Contains the International space station

• Exosphere

• Where most meteors burn up

• Stratosphere

• Contains the ozone layer

• Mesosphere

• Where the weather happens

• Troposphere

Explain why the ozone layer is important.

Label the graph to correctly represent the amounts of oxygen, nitrogen, and other gases in the atmosphere.

a

b

c

oxygen

nitrogen

other gases

Tags

NGSS.MS-ESS2-1

The Montreal Protocol was significant because

• It was the first time everyone agreed to do nothing

• Only half of the countries signed the treaty

• It was not significant

• It was the first time the whole world agreed to fix a problem

Tags

NGSS.HS-ESS3-4

NGSS.HS-ETS1-1

NGSS.HS-LS2-7