What do we call air that moves from areas of low pressure to areas of high pressure?
Wind
100
What are low, layered gray clouds that produce light precipitation?
stratus
100
What occurs when a current flows between different regions of the opposite charges within a cloud or between the cloud and ground?
Lightning
100
What do we call a large body of air that has the same properties as the surface over which it develops?
air mass
100
On weather maps, what are stations having the same air pressure are connected by?
Isobars
200
What do we call the temperature at which the air is saturated and condensation forms?
Dew Point
200
What are high, white feathery clouds usually associated with fair weather?
Cirrus
200
What is a violently rotating column of air in contact with the ground?
tornado
200
Where do two air masses meet?
At a front
200
On weather maps, what are stations having the same temperatures are connected by?
isotherms
300
When air holds all the water vapor it possible can, we say it is ________________.
Saturated
300
What are stratus clouds close to the ground called?
Fog
300
What type of storm develop over water in tropical regions?
hurricane
300
What kind of front is represented by red half circles and brings warm air over cold air?
a warm front
300
If the air can hold 10 pounds of water vapor but now only has 3 pounds, what is the relative humidity of this air?
30%
400
What is a measure of the amount of water vapor in the air compared to the amount needed for saturation?
relative humidity
400
What kind of cloud produces heavy rains for a short period of time?
cumulonimbus
400
What type of severe weather results from the rapid heating of air during a thunderstorm?
Thunder
400
Along what type of fronts do thunderstorms generally occur?
Cold
400
How would you describe the type of air brought in by a continental polar air mass?
cold and dry
500
The amount of water vapor air can hold depends on _____________.
air temperature
500
What do we call thick, puffy clouds?
cumulus
500
What is a storm in which the temperatures are low, visibility is less than 400 m, winds are 56 km/hr, there is falling or blowing snow, and these conditions last for three or more hours?
blizzard
500
What is the weather like at areas of low pressure?
cloudy, stormy
500
Present day weather predicitions are based primarily on: