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science chap 2 rev


Meteorologist studies weather and uses imformation from Doppler radar,weather satellites,computers and other instruments to make weather maps and provide forecasts.
Humidity amount of water vapor held in the air.
Dew point temperature at which air is saturated and condensation forms.
Fog A stratus cloud that forms when air is cooled to its dew point near the ground.
Precipitation water falling from clouds including rain,snow,sleet and hail whose form is determined by air temperature.
Air mass Large body of air that has the same characteristics of temperature and moisture content as the part of earth's surface over which it formed.
Front Boundary between two air masses with different temperatures ,density,or moisture;can be cold,warm,occluded, and stationary.
Weather state of the atmosphere at a specific time and place, determined by factors including air pressure ,amount of moisture in the air, temperature, and wind.
blizzard Winter storm that lasts at least three hours with temperatures of -12C or below,poor visibility, and winds of at least 51km/h.
Isotherm a line on a map or chart of the earth's surface connecting points having the same temperature at a given time or the same mean temperature for a given period
Isobar an imaginary line or a line on a map or chart connecting or marking places of equal barometric pressure.
Relative humidity the ratio of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature.
Tornado a violent destructive whirling wind accompanied by a funnel-shaped cloud that progresses in a narrow path over the land.
hurricane a tropical cyclone with winds of 74 miles (119 kilometers) per hour or greater that occurs especially in the western Atlantic, that is usually accompanied by rain, thunder, and lightning, and that sometimes moves into temperate Latitudes.
Created by: leitner6