Air Masses and weather Fronts

What are air masses?

• Small pockets of air with varying temperatures and moisture

• Large bodies of air with the same temperature and moisture at any given altitude

• Clouds that form at high altitudes

• Winds that blow from the poles to the equator

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

How do air masses form?

• By rapidly moving over different regions

• When a body of air remains over a region of Earth’s surface

• By mixing with other air masses

• By rising quickly into the atmosphere

Tags

NGSS.MS-ESS2-5

What are the two main properties of air masses?

• Pressure and density

• Temperature and humidity

• Altitude and speed

• Volume and mass

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Which type of air mass is described as moist and cold?

• cA

• mT

• mP

• cT

Tags

NGSS.MS-ESS2-5

Which type of air mass is dry and very cold?

• cA

• mP

• cT

• mT

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

What happens when air masses collide?

• They mix completely

• They form a new type of air mass

• They usually don’t mix and result in weather changes

• They disappear

Tags

NGSS.MS-ESS2-5

What is a front?

• A type of cloud

• A sharply defined boundary formed when two unlike air masses meet

• A region of high pressure

• A warm air mass

Tags

NGSS.MS-ESS2-5

Which type of air mass is described as dry and warm?

• mP

• cT

• cP

• mT

Tags

NGSS.MS-ESS2-5

What is the effect of convection on air masses?

• It keeps them stationary

• It moves warm air toward the poles and cool air toward the equator

• It causes them to rise into the stratosphere

• It makes them disappear

Tags

NGSS.MS-ESS2-5

Which type of air mass is moist and warm?

• cA

• mT

• cP

• cT

Tags

NGSS.MS-ESS2-5