Air is denser near Earth’s surface than high in the atmosphere.

• true

• false

Air pressure is greater at the top of a mountain than at lower elevations.

• true

• false

In the troposphere, as air temperature increases, generally air pressure increases, too.

• true

• false

Wind is the movement of air from an area of low pressure to an area of high pressure.

• true

• false

Condensation nuclei are particles of atmospheric dust around which

• ozone collects.

• evaporation occurs.

• cloud droplets form.

• winds form.

Tags

ngss

In orographic lifting, clouds form when moist winds

• flow over the sea.

• encounter mountains.

• become drier.

• warm up the ground.

Tags

NGSS.MS-ESS2-5

Cloud droplets collide to form larger droplets in a process called

• coalescence.

• condensation.

• convection.

• composition.

Where would you expect to find the strongest wind?

• forest

• city

• desert

• mountains

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

What type of precipitation occurs as rain droplets move up and down through freezing and nonfreezing air?

• snow

• sleet

• hail

• rain

Earth’s atmosphere contains more ____ than any other substance.

• hydrogen and nitrogen

• nitrogen and oxygen

• helium and oxygen

• carbon and nitrogen