Weather Test
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36 Terms
What is the vertical movement of air in a high pressure system?
sinking
What is the vertical movement of air in a low pressure system?
rising
associated weather of high pressure system
fair/clear
associated weather of low pressure system
stormy/cloudy
Direction of winds around high pressure system
clockwise away from center
Direction of winds around low pressure system
counter-clockwise towards the center
Weather conditions on west side of high pressure system
clear and warm
Weather conditions on west side of low pressure system
cloudy and cool
Weather conditions on east side of high pressure system
cloudy and cool
Weather conditions on east side of low pressure system
clear and warm
Symbol for a cold front
Blue line with triangles
Symbols for warm front
Red line with semicircles
Change in temp for cold front
decrease
Change in temp for warm front
increase
Change in pressure for cold front
Decrease
Change in pressure for warm front
Increase
Change in humidity for cold front
Decrease
Change in humidity for warm front
Increase
Change in wind speed for cold front
increases as the front approaches, then decreases as it passes.
Change in wind speed for warm front
decreases as the front approaches, then increases after it passes.
Density of cold air mass
high
Density of warm air mass
low
Humidity of cold air mass
low
Humidity of warm air mass
high
Where does a cP air mass form and what are it’s characteristics
Land and north; cold and dry
Where does a mP air mass form and what are it’s characteristics
Ocean and north; cool and moist
Where does a cT air mass form and what are it’s characteristics
Land and south; hot and dry
Where does a mT air mass form and what are it’s characteristics
Ocean and south; warm and moist
Which side is windward and what happens to the air on that side of the mountain?
The windward side is the side receiving the wind or facing the ocean; warm moist air rises, expands and cools off then moisture condenses forming clouds and precipitation
Which side is leeward and what happens to the air on that side of the mountain?
The leeward side is the side sheltered from wind or facing land (away from ocean); cool dry air sinks and warms up which drys land forming a rain shadow and desert.
What are the 4 steps to create wind
uneven heating of Earth
warmer air becomes less dense and rises and cooler air becomes more dense and sinks
Rising air creates areas of low pressure and sinking air creates areas of high pressure
Air moves from high pressure to low pressure
How are temperature and density related?
the higher the temperature the faster and more spread apart molecules become created an area of low density while in lower temperatures the slower and more condensed molecules become creating an area of high density; temp and density are inversely proportional.
Why does warm air always go over cold air?
Warm air is less dense creating a lighter weight making it rise while cool air is more dense creating a heavier weight making it sink bat W
What happens to the warm air when it rises if there is enough moisture in the air?
Moisture in the air will condense and form clouds creating precipitation
Warm Front
Cold Front