Air Pressure and Weather

Question 1

Air pressure

Answer 1

Sum of total focus of air note molecules striking a surface at each moment.

The higher the temp in open air, the lower the pressure, the colder, the higher
- More molecules more pressure

Question 2

Coriolis Effect

Answer 2

-Deflection of wind
-Earth’s rotation
-Northern Hemisphere–right(spin)
-Southern Hemisphere–left(spin)
-curved

Question 3

Weather fronts

Answer 3

Change in weather, boundary between two air masses.

Question 4

Cold fronts

Answer 4

-when cold air meets warm air
-most aggressive front
-heavy rain
-less humid air after cold front
-lifts warm air out of its way
-Often brings sudden change in weather
-strong winds
-Thunderstorms/tornadoes in the spring and summer
-snow in the late fall and winter

Question 5

Warm front

Answer 5

-Warm air runs into cold air
-warm air moves faster than cold air
-flows over cold air mass
-steady rain
-humid and warm after front
-first thing you see will be clouds forming high in the sky
-light precipitation

Question 6

Stationary Front

Answer 6

-2 air masses stop moving when they meet
-Stalled air masses
-may bring clouds and precipitation to some areas for many days
-very slow

Question 7

Absolute Humidity

Answer 7

-grams of water vapor per cubic meter volume of air
-measure of the actual amount of water vapor
-Higher the amount of water vapor, higher the absolute humidity.

Question 8

Relative Humidity

Answer 8

-RH
-expressed as a percentage
-measures water vapor RELATIVE to the temperature of the air (measure of actual amount of water vapor in the air compared to the total amount of vapor that can exist in the air at its current temperature.

-with the same amount of absolute humidity, the warmer air will have a lower relative humidity compared to the colder air

Question 9

Dew point

Answer 9

-Temp
-measure of the actual amount of water vapor in the air
-Temperature that the air should be to reach 100% absolute humidity

-50s (comfortable), 60s(somewhat uncomfortable), 70s very uncomfortable, very humid), 80s oppressive

Question 10

Pressure gradient

Answer 10

-The greater the pressure gradient, the faster the winds
-HP—–> LP,
-Difference in atmospheric pressure

Question 11

Friction with winds

Answer 11

-Friction caused by winds slows them down
-turns them toward low pressure systems and out of high pressure systems
-winds near the ground are said to spiral into lows and out of highs

Question 12

Changing air pressure

Answer 12

Adding/removing air molecules
Adding/removing heat

Question 13

Elevation with pressure

Answer 13

The temperature has no effect on the air pressure for elevation.

It is the gravity since the higher the elevation, the more gravity pushes the molecules downwards. So, the lower the elevation, the higher the pressure

Question 14

Density

Answer 14

The higher the temperature, the less dense something will be because of the molecules spreading apart.