The Atmosphere

What is the air composition of the Earth’s atmosphere (percentages)?

• 78% nitrogen; 21% oxygen; 1% other gases

• 75% nitrogen; 25% oxygen

• 21% nitrogen; 78% oxygen; 1% other gases

• 70 nitrogen; 20% oxygen; 10% other gases

Why is water vapor not included in air composition percentages?

• because their amount varies from place to place.

• because they don't exist

• because they are always the same

Select ALL the ways the atmosphere helps life on Earth?

• Provides air for us to breathe

• Keeps us warm

• Protects us from meteors and UV rays

• Allows us to hear sound

• Needed for the water cycle and weather

Tags

NGSS.MS-ESS2-6

NGSS.MS-ESS2-5

NGSS.MS-ESS2-4

What are the three main properties of air? Select ALL.

• Mass

• Volume

• Density

• Sound

• Temperature

How are altitude, pressure, and density related? Select TWO.

• Pressure and density DECREASE as altitude INCREASES

• Pressure and density INCREASE as altitude DECREASES

• They are not related to one another

• Pressure and density INCREASE as altitude INCREASES

• Pressure and density DECREASE as altitude DECREASES

Where is the warmest temperature?

• Thermosphere

• Mesosphere

• Stratosphere

• Mesopause

Where is the warmest temperature?

• Exosphere

• Mesosphere

• Stratosphere

• Mesopause

Where is the Aurora Borealis?

• Thermosphere

• Mesosphere

• Stratosphere

• Mesopause

Where is the lowest density AND lowest pressure?

• Thermosphere

• Mesosphere

• Stratospause

• Troposphere

Where is the International Space Station?

• Thermosphere

• Troposphere

• Mesopause

• Stratosphere