Air Pressure

Warm air is (blank) than (blank)

less dense, cold air

A water molecule has (blank) than other molecules that make up the air

less mass

Less dense air will have a (blank) air pressure- there are fewer air molecules to push down on you.

lower

Therefore, warm air has a (blank) air pressure and cold air has a (blank) air pressure.

lower, and higher

The molecules in warm air are (blank) and are spread farther apart. Therefore there are fewer air molecules in a given area to (blank)

moving fast, and to push down on you

Where is air pressure the greatest and WHY?

Air Pressure is greatest at the surface of Earth because there is more of the atmosphere above you to push down on you.

air pressure-

Air pressure is the measure of the force with which air molecules push on a surface.

The piece of equipment used to measure air pressure is a

Barometer

maritime polar

Cool and moist

Air Pressure is (blank) at the surface of Earth because (blank)

GREATEST, there is more of the atmosphere above you to push down on you.

(blank)air pressure usually results in (blank)

High, Good weather: clear skies, no precipitation

Areas of (blank) and (blank)pressure on shown on a weather map with an H or an L.

High, or low

Continental Artic

bitterly cold and dry

High pressure systems bring (blank) clear/sunny weather and wind flows out (blank) and

clear/sunny, clockwise (right)

continental polar

cold and dry

High pressure systems indicate pressure systems indicate a (blank) air mass that will....... SINK!!!

colder more dense

Isobars

connect areas with equal air pressure

Moist air is (blank) than dry air, and therefore has a (blank) air pressure.

less dense, and lower

What are three factors that affect air pressure?

- Elevation, or altitude - Temperature - Water content

Air Pressure is affected by 3 factors

1- Elevation, or altitude 2- Temperature 3- Water content

What is the interval between each isobar line?

4

What is the impact of altitude on air pressure? EXPLAIN.

As you move up through the atmosphere, the pressure decreases

Describe the 4 air masses

Continental polar- It is a cold and dry place Maritime polar- The air masses are cool, and unstable. Continental tropical- Hot and dry masses Maritime tropical- there is a lot of rain throughout the year

What is an isobar?

Isobars connect areas with equal air pressure.The distance between the isobars is called the pressure gradient

Describe what a barometer AND how it works. ( your answer should include several sentences)

It measures the air pressure. It tells you if the weather will be good or bad, and if you have high pressure or low pressure. When the pressure rises the needle on the barometer shows up.

How is an isobar map created?

It's a line drawn on a map with connecting points.

What is the relationship between air pressure and temperature?

Low pressure weather systems means warmer air tends to rise, high pressure systems indicate a colder more dense air mass that will....... SINK!!!

(blank) air pressure usually results in (blank)

Low, Bad weather: stormy, cloudy, overcast.

What is the relationship between air pressure and density?

More dense air will have a higher air pressure- there are more air molecules in a given space to push down on you. Less dense air will have a lower air pressure- there are fewer air molecules to push down on you.

How does air pressure affect our weather?

Warm air is less dense than cold air. Therefore, warm air has a lower air pressure and cold air has a higher air pressure.

As you move UP through the atmosphere, air pressure (blank)

decreases.

Air pressure is the measure of (blank) with which (blank) on a surface

force, and air molecules push

The closer the isobar lines, the greater the change in air pressure, and the

greater/faster the winds speeds.

More dense air will have a (blank) air pressure- there are more air molecules in a given space to (blank)

higher, push down on you

continental tropical

hot and dry

The distance between the isobars is called the

pressure gradient

As you move (blank) through the atmosphere, air pressure (blank)

up, and decreases

Maritime tropical

warm and moist

Low pressure weather system means (blank)

warmer air tends to rise

Air pressure in a weather system reflects the amount of (blank) in the air, which affects (blank)

water, and the weather.