What percent of our atmosphere is made up of gases other than Nitrogen and Oxygen?

• 1%

• 78%

• 21%

• 95%

Scientists divide Earth's atmosphere into layers and are classified by changes in

• Temperature, altitude, composition, and density

• Temperature and altitude

• Altitude, composition and density

• Temperature and density

In which layer of the atmosphere do meteors burn up?

• Mesosphere

• Stratosphere

• Troposphere

• Exosphere

What is the hottest layer of the atmosphere?

• Mesosphere

• Exosphere

• Stratosphere

• Thermosphere

The less mass in a given volume of air, the

• more dense the air

• greater the air pressure

• less dense the airl

• more the air weighs

As you increase in altitude, air pressure

• doesn't change

• first increases, then decreases

• increases

• decreases

The layer of our atmosphere in which weather occurs is the

• Mesosphere

• Thermospher

• Troposphere

• Stratosphere

Tags

NGSS.MS-ESS2-5

In which layer do auroras occur?

• Exosphere

• Mesosphere

• Troposphere

• Thermosphere

Cool air tends to

• be more dense and flow under warm air

• mix easily with warm air masses

• be lifted up by more dense warm air

• be less dense and flow over warm air

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

On warmer days, you may notice that the air feels more humid. This is because

• it usually rains on warm days, so the air feels more humid.

• the air is more dense on warm days.

• warm air holds more moisture than cold air.