What gas makes up 21% of the atmosphere?

• Nitrogen

• Oxygen

• Argon

• Carbon Dioxide

What gas makes up 78% of the atmosphere?

• Nitrogen

• Oxygen

• Argon

• Carbon Dioxide

The _____ is the layer of the atmosphere that is the closest to the ground.

• Thermosphere

• Stratosphere

• Mesosphere

• Troposphere

The _____ is the hottest layer of the atmosphere.

• Thermosphere

• Stratosphere

• Mesosphere

• Troposphere

What causes global winds?

• movement of air from areas of low pressure to areas of high pressure

• conduction currents caused by cool and warm air

• radiation currents caused by absorbing the sun’s heat

• unequal heating of Earth’s surfaces over large areas

Tags

NGSS.MS-ESS2-6

Why is it hard to breathe at high altitudes?

• Decreased air pressure causes the density of air to increase at higher altitudes.

• Decreased air pressure causes the density of air to decrease at higher altitudes.

• Increased air pressure causes the density of air to increase at higher altitudes.

• Increased air pressure causes the density of air to decrease at higher altitudes.

Which step in the water cycle would explain why a puddle would disappear as the day goes on?

• precipitation

• evaporation

• condensation

• crystalization

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

Which step in the water cycle would explain why clouds begin to form?

• precipitation

• evaporation

• condensation

• crystalization

Tags

NGSS.MS-ESS2-4

What does the amount of humidity describe?

• The amount of moisture in the air

• The amount of air pressure

• The temperature of the air

• The amount of oxygen in the air

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-5

What stage of the water cycle is shown at position A?

• Evaporation

• Condensation

• Precipitation

• Respiration

Tags

NGSS.MS-ESS2-4