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28 Cards in this Set
- Front
- Back
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air pressure |
the pressure that a column of air exerts on the air or surface below it |
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air mass
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large body of air with distinct temperature and moisture characteristics |
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blizzard |
violent winter storm characterized by freezing temperature, strong winds, and blowing snow |
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Doppler radar |
specialized radar that can detect precipitations and movement of small particles and can approximate wind speed |
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front |
boundary between two air masses |
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high-pressure system |
large body of circulating air that has high pressure at its center and lower pressure on the outside |
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humidity |
amount of water vapor in the air |
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hurricane |
intense tropical storm with winds exceeding 119km/hr |
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isobar |
line on a map used to connect all places where air pressure has the same value |
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kinetic energy |
the energy an object has due to its motion |
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low-pressure system |
large body of circulating air that has low pressure at its center and higher pressure on the outside |
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precipitation |
water, in liquid or solid form, that falls from the atmosphere |
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relative humidity |
amount of water vapor present in the air relative to the maximum amount of water vapor the air can contain at that temperature |
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tornado |
violent, whirling column of air that comes in contact with the ground |
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variable |
a quantity that can change |
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water cycle |
a set of natural processes in which water continually moves among ocean, land, and the atmosphere |
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weather |
atmospheric conditions of a certain place at a certain time |
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climate |
long-term average weather conditions that occur in a particular region |
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drought |
period with below-average precipitation |
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deforestation |
large-scale cutting and/or burning of forests |
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el nino |
combined ocean and atmospheric cycle that results in weakened trade winds across the Pacific ocean |
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global warming |
rise in Earth's average surface temperature during the past 100 years |
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greenhouse gas |
a gas in the atmosphere that absorbs Earth's outgoing infrared radiation |
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ice age |
cold period, lasting hundreds to millions of years, during which glaciers cover much of the Earth |
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monsoon |
wind circulation pattern that changes direction with the seasons |
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phenomenon |
observable fact or event |
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revolution |
action by a celestial body of going around in a orbit or in an elliptical course |
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specific heat |
amount of thermal energy needed to raise the temperature of 1 kg of a material by 1 degree celsius |
