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weather missc
| Question | Answer |
|---|---|
| Air mass | a pocket of air with similar characteristics throughout it. |
| Air pressure gradient | a gradual change in air pressure from one place to another |
| Atmospheric (barometric) pressure | the weight of the air pressing on earth’s surface. |
| Anemometer | an instrument used to measure wind speed. |
| Atmospheric transparency | a measure of the amount of light passing thru the atmosphere |
| Barometer | an instrument that measures atmospheric pressure |
| Cloud Cover | The percent of the sky covered by clouds |
| Cold Front | the leading edge of a cold air mass |
| Cyclone | an area of low pressure that spins towards its center |
| Dew point | temperature at which water vapor condenses to form dew |
| Dry bulb thermometer | a regular thermometer with a dry piece of cotton on the end |
| Wet bulb thermometer | thermometer with a wet cotton ball or a wet “sock” at the bottom |
| Front | the boundary between two air masses |
| Humidity | a measure of the amount of water vapor in the air |
| Relative humidity | the ratio between the amount of water vapor in the air and how much it could hold |
| Isoline | a line that connects point of equal value |
| Jet stream | a ‘river’ of air that circles the globe near the north and south poles |
| Monsoon | cyclic and extreme weather changes caused by seasonal changes in wind and ocean currents |
| Occluded front | boundary between a cold front overtaking a warm front, causing an updraft and cyclone |
| Planetary wind belt | a stream of air that circles the globe; caused by earth’s rotation |
| Polar front | an air mass of cold, dry (continental) or moist (maritime) air formed near a pole |
| Precipitation | rain, sleet, hail, snow, etc |
| Probability | the percent chance that an event will occur. |
| Psychrometer | an instrument used to measure relative humidity using wet bulb and dry bulb thermometers |
| Radar | use of radio waves to locate objects in the sky |
| Troposphere | layer of the atmosphere that rests on earth’s surface |
| Visibility | the farthest distance you can see an object |
| Warm front | leading edge of a warm air mass |
| Water vapor | Water in the gas phase |
| Weather variables | characteristics of weather that can be measured |
Created by:
missc631
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