Inv. 2 Air Pressure and Wind

Which most likely results in cloudy, stormy weather?

• a high pressure system

• a low pressure system

Lower air pressure causes air to .....

• compress

• doesn't affect air

• expand

Air flows from high pressure to low pressure until it reaches ....

• a lower density

• equilibrium

• a different state

Can water be compressed?

• Yes because there is a lot of space between particles.

• No because there is a lot of space between particles.

• No because there is not a lot of space between particles to move.

• Yes because there is not a lot of space between particles to move.

Compression makes air...

• More dense

• Less dense

• Does not affect air

When compressed air particles become ...

• smaller

• stay the same

• bigger

The higher the altitude, the lower the air pressure.

• True

• False

National Weather Service maps indicate air pressure in ________________

• millibars

• inches of mercury

As air pressure decreases, so does density.

• True

• False

• I don't know

The air pressure at sea level is ______________ than the air pressure at the top of the mountain.

• greater, more

• less