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Chapter 7

Weather

QuestionAnswer
weather the atmospheric conditions, along with short-term changes, of a certain place at a certain time
air pressure the force that a column of air applies on the air or a surface below it
humidity the amount of water vapor in the air
relative humidity the amount of water vapor present in the air compared to the maximum amount of water vapor the air could contain at that temperature
dew point the temperature at which air is saturated and condensation can occur
precipitation water, in liquid or solid form, that falls from the atmosphere
water cycle the series of natural processes by which water continually moves among oceans, land, and the atmosphere
high-pressure system a large body of circulating air with high pressure at its center and lower pressure outside of the system
low-pressure system a large body of circulating air with low pressure at its center and higher pressure outside of the system
air mass large bodies of air that have uniform temperature, humidity, and pressure
front a boundary between two air masses
tornado a violent, whirling column of air in contact with the ground
hurricane an intense tropical storm with winds exceeding 119 km/h
blizzard a violent winter storm characterized by freezing temperatures, strong winds, and blowing snow
surface report describes a set of weather measurements made on Earth's surface
upper-air report describes wind, temperature, and humidity conditions above Earth's surface
Doppler radar a specialized type of radar that can detect precipitation as well as the movement of small particles, which can be used to approximate wind speed
isobar lines that connect all places on a map where pressure has the same value
computer model detailed computer programs that solve a set of complex mathematical formulas
Created by: tduvall
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