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34 Cards in this Set
- Front
- Back
Weather
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is the state or condition of the atmoshpere at any given location for a short period of time
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Climate
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is the overall view of a regions weather conditions over a long period of time
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Weather variables
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Temperature, Air Pressure, Moisture, Wind
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How do clouds form?
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-condensation nuclei
-moisture -temperature below temperatures |
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High Pressure System and Low Pressure Systems
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The fastest winds devolp in larger and more powerful atmoshperic events than the more local land and sea breezesor mountain and valley breezes.
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Temperature
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the measure of the kinetic or motion energy of the particles in the object being measured
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Therometer
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insturment used to measure temperature
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Air Pressure
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the weight of the atmosphere as Earths gravity pulls on air.
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Barometer
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instrument used to measure air pressure
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-Humidity
-Relative Humidity |
-is the water vapor content of the air.
-expresses how full of moisiture the air is, because it is shown as a percent of the moisture that is in the air compared to how much the air could hold at that temperature |
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Wind
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-wind direction is named for the direction toward which it blows
-wind blows from regions of higher pressure to lower pressure -the steeper gradient the greater the wind speed |
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Solid State to Liquid State
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80 calories must be supplied
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Liquid state to solid state
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80 calories must be released
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liquid state to a vapor state
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540 calories supplied
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vapor state to a liquid state
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540 calories released
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Transpiration
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process of water given to atmosphere from plant
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Evapotranspiraton process
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-requires 540 calories/gram to change liquid to water vapor(latent heat of vaporazation)
-almost all of the energy is supplied by insolation. -solar energy is converted to a stored energy or potential energy |
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Rain
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>0.2 mm
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Drizzle
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0.2-0.5 mm
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Snow
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falling ice crystals
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Sleet
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Solid pellets of ice that form by freezing of rain drops as they fall
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Hail
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layers of ice, snow, and water formed by movements of thunderstorm clounds
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Zone of Convergence
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-Low Pressure Systems
-because rising air at the center causes surrounding air from higher pressure areas to come together or converge to replace it |
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Zone of Divergence
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-high pressure systems
-because the sinking air moves apart at Earths surface |
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Anticyclones
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High Pressure Systems
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Coriolis Effect
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-Earth Spins counter clockwise from west to east
-Large scale wind patterns which should result in direct movement of wind from north to south appear to be deflected because of Earths rotation. |
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Coriolis Effect-2
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-in the Northern hemisphere wind moving from a high pressure system appeart to curve to the right
-turn clockwise -only in northern hemisphere |
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Coriolis Effect-3
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-in the northern Hemisphere winds moving into a low pressure system do not appear to have a straight on approach but instead come in on a diagonal from right to left
-counter clockwise |
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High Pressure System
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D O C D
o u l i w t o v n c e k r w g i e s n e c e |
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Low Pressure System
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U I C C C
P N o l o u o n n c v t w e e i r r s g e e n c e |
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Jet Streams
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Jet streams are wandering currents of air far above earths surface. They usually occur when cold polar air meets warmer air and meteorologist follow their movemetns closely because they influence the devolpment and movement of weather systems.
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cP
cT mP mT cA |
-Cold to cool and dry
-Hot and dry -Cool and moist -Warm and moist -very cold and very dry |
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Thunderstorms
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-Start out as low pressure systems where warm moist air is either lifted due to an occluded front or because local heating causes large pressure difference and lot of convetive rising
-usually tall cummulonimbus |
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abiadbatic cooling
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happens any time air rises expands and tehen cools as a result of reduces atmospheric pressure
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