Atmospheric Pressure And Winds

Question 1

Air pressure

Answer 1

Weight of atmosphere per unit area

Question 2

Barometer

Answer 2

Instrument used to measure air pressure

Question 3

Cyclone

Answer 3

Low pressure
Winds move counterclockwise
Weather is rainy because air is forced to rise

Question 4

Anticyclone

Answer 4

High pressure
Winds move clockwise
Weather is clear and dry

Question 5

Why does air pressure change?

Answer 5

1) Temperature changes
- when warm air replaces cool air; air pressure at the ground falls
- arrival of cold air higher up causes pressure at the ground to rise
2) Humidity changes
- more H2O vapor the lighter it is because H2O vapor is lighter than nitrogen and oxygen that was pushed out

Question 6

Front

Answer 6

Boundary between any two air masses

Question 7

After a cold front passes

Answer 7

Weather changes drastically
Temp decreases and wind speed increases
Rain ends after front passes

Question 8

Stationary front

Answer 8

Neither air mass is displaced
Front does not move
Weather=warm front weather

Question 9

Maritime tropical mT

Answer 9

Warm and humid

Question 10

Continental tropical cT

Answer 10

Dry and hot

Question 11

Maritime polar mP

Answer 11

Cold and humid

Question 12

Continental polar cP

Answer 12

Cold and dry

Question 13

Continental arctic cA

Answer 13

Very cold and very dry

Question 14

Air mass

Answer 14

Huge section of air in lower troposphere with same weather throughout

Question 15

ITCZ

Answer 15

Inter tropical Convergence Zone

Low pressure zone at equator where winds from both hemispheres converge

Question 16

Air pressure is measured in ________

Answer 16

Millibars

Question 17

Isobars connect points of _______ ____________

Answer 17

Equal pressure

Question 18

Warm front dominant cloud

Why?

Answer 18

Stratus

Slope of front is gradual=stable air

Question 19

Cold front dominant cloud

Why?

Answer 19

Cumulus

Slope is steep=unstable air

Question 20

Why do fronts bring precipitation?

Answer 20

They force air to rise creating unstable air and clouds

Question 21

4 types of cold fronts

Answer 21

Cold front _^_^_^_^_^_^_
Warm front _o_o_o_o_o_
Occluded front _/\_o_/\_o_/\_o_
Stationary front _/\_/\_/\_/\_/\_/\_/\_
                            ooooooooooooo

Question 22

Occluded front weather

Answer 22

Same as cold front

Question 23

Stationary front weather

Answer 23

Same as warm front

Question 24

Cold front weather

Answer 24

Showery before with thunderstorms common
Cumulus clouds because of unstable air
After-temp decreases, wind speed increases, rain stops

Question 25

Warm front weather

Answer 25

Thunderstorms can form but not common
Precip ahead of front
Stratus clouds form because air is stable
After-temp is warmer

Question 26

Pressure

Answer 26

Force per unit area