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35 Cards in this Set
- Front
- Back
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atmosphere
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the layer of gases surrounding earth- provides earth with gases to support life absorbs and distributes warmths- stores releases heat
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composition of atmosphere
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keep earth from moving into space-mixture of gases liguid water exerts pressure in all directions
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most abundent gases?
and there precents? |
nitrogen- 78%
Oxygen- 21% |
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Aerosols
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solids- dust pollen tiny liguids, droplets like acid in atmorsphere
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layers of the atmosphere
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1-tropshere 2-stratoshere 3-mesosphere 4-thermosphere exospere
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troposphere is?
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layer closest to teh earhts surface contains 3/4 of matter in earths whole atmospere
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stratpsphere is?
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obsorbs most of the suns ultraviolet eadiation. coantins little ozone
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mesosphere is?
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contains little ozone
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thermpsphere is?
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filters out harmfull x-rays and gamma rays from the sun
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exosphere is?
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extends ouward to where space begins and contains few atoms. no clear boundary sperates it from space
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ionosphere is?
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can reflect amradio waves makes long communitcation possible
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water cycle is?
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evaporation-water energy heat liquid to h2o vapor - tranpsiration water from plants go into the sky condensation -water goes back to droplets to earth
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what does weather mean?
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describes teh current condition of atmosphere.
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temperature is?
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sun-soarce almost of aengergy. when sun rays hit earht energy is obsorbed. temp measures how how fast air milecules are moving.ll
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energy tranfer?
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fast mving molecules trnaferm energy to slower moving molecules when tgey bump into each other
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humitity is?
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air warms up cause water to contact with evaporation to form vapor. amount of water vapor in atmosphere.
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relative humidity
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measure of amount of water vapor that is present compared to amount that could be held a a specific temp.
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clouds are what?
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form when air rises, cools to its dew point then becomes saturated
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low clouds are what?
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include puffy clouds form when air rises carrys moist 2000 or less altitude
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middle clouds are what?
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2000 -8000 m layerd variety sometimes alot of moist which make light precipitation
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high/vertical clouds are?
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happenin air so cold they are made of ice crystals
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precipitation is?
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when drops of water or crystals of ice become too large to be suspended in a cloud they fall as it. inrain freezing rain, sleet, snow and hail.
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wind is?
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molecules in atmosphere are heated, they move more rapidly and spread apart. wind-less dense moves upward slower-move closer
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gernarl air circulation
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sun ays strike earthnear equator then near the poles.
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surface winds
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air in equartor is heated by suns ray
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westerlies & easterlies
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blow from wes & are called previeling westerlies tehy form boundarys frmo col dair to the poles and milder air closer to equator
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Jet stream
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within zone. like giant rivers of air low near the top of troposphere from west to to east
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other winds
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forming around the world bc of heated & cooling differences
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air mass is?
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large body of air that developes over a particular region of earths surface
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fronts?
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where air masses of different temps meet a boundary between them
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cold fronts?
what forms? |
cold air mass advances and pushes under a warm air mass warm air mass is forced to rise cloud snad precipitaion develope.crop in temp
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warm fronts
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when warm air advances into a region of colder air, warm air front is formed. less dence air slides up over colder denser air mass
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stationary fronts
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warm air and cold air mass meet but neither advances
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occluded front
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illistrates how and occluded front foms fast movingcolr front overtakes a lsower warm front
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high and low pressure?
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high pressure= air sinks
air flows into low pressure center it rises adn cools |
