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Unit 6 Semester 1
Weather 1
| Question | Answer |
|---|---|
| Doppler radar | a weather radar system that uses the Doppler effect to measure velocity, particularly useful in warning of severe storms such as tornadoes |
| advection | the horizontal movement of air or an atmospheric factor (for example, pollutants) through the atmosphere |
| aerovane | an instrument that measures both wind direction and speed |
| air mass | a body of air covering a relatively wide area, with about the same properties through any horizontal section |
| air pressure | the force exerted by the weight of a column of air above a given point |
| anemometer | an instrument used to measure wind speed |
| barometer | an instrument used to measure barometric pressure |
| barometric pressure | the pressure of the atmosphere, usually expressed in terms of the height of a column of mercury; also called air pressure |
| ceilometer | an instrument for measuring, by way of triangulation, the height of the cloud ceiling above the surface |
| cloud | a visible mass of tiny water droplets, ice crystals, and solid particles in the atmosphere |
| condensation | the process by which water vapor changes from gas to liquid |
| condensation nuclei | particles that serve as surfaces onto which water vapor condenses |
| cyclone | a large |
| dew point | the temperature at which water vapor begins, or would begin, to condense |
| front | the region where two air masses meet |
| humidity | the amount of water vapor in a given volume of air |
| hurricane | a tropical cyclone in the Atlantic Ocean, Caribbean Sea, Gulf of Mexico, or eastern Pacific Ocean |
| hygrometer | an instrument that measures humidity (moisture in the air) |
| isobar | line on a weather map that connects areas of equal air pressure |
| isotherm | line on a weather map that connects areas of equal temperature |
| occluded front | a front in which two or more cold air masses surround a warmer mass |
| orographic uplift | mountains obstructing air flow, forcing the air to ascend (orographic pertains to mountains, their structure and topography) |
| radiosonde | a small radio transmitter carried aloft, likely by a weather balloon, with instruments for reading and broadcasting atmospheric conditions |
| relative humidity | the amount of water vapor in the air divided by the amount that would have to be present in the same air to form a cloud or condense on a surface |
| stationary front | a front between warm and cold air masses that is moving very slowly or not at all |
| supercell | a thunderstorm consisting of one somewhat |
| Thermograph | a thermometer that automatically records its temperature readings onto a chart |
| tornado | a violently rotating column of air, with circulation reaching the ground, that begins as a funnel cloud and may be accompanied by a loud roaring noise; locally it is the most destructive of all atmospheric phenomena |
| trough | in weather, an elongated area of low pressure |
| weather | the conditions in the atmosphere at a particular place and time |
Created by:
SCID
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