4 things affect atmospheric pressure...name them.?
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Carbondioxide gas, Oxygen gas and Nitrogen gas
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Intake\nCompression\nPower stroke\nExhaust
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"There are basically four elements of weather that can help describe weather. The four elements include  wind, temperature, air pressure and moisture." (From the ref.) These may seem an arbitrary choice until you realize that they are all easily measurable and independent of each other, whereas dew point and cloud cover can be said to derive from humidity, temperature and pressure.
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Air pressure or atmospheric pressure is the pressure above any area in the Earth's atmosphere caused by the weight of air. It depends on the altitude and weather conditions.\n\nGas pressure is explained by kinetic theory. Gas pressure is considered the pressure arising from the force exerted by colliding gas molecules onto the walls of the container. Gas pressure depends on the kinetic energy of the gas molecules.\n\nfor more details see: \nhttp://en.wikipedia.org/wiki/Kinetic_theory#Pressure\nhttp://en.wikipedia.org/wiki/Atmospheric_pressure
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The list can go on and on, but as the previous poster mentioned, they are virtually all associated with low pressure areas at some level (surface &/or aloft).\n\nA few examples are:\n\nOrdinary (synoptic scale) Lows\nNor'easters\nAlberta clippers\nColorado Lows\nInverted trofs\nInland runners (in from the Atlantic coast)\nCoastal Lows\nHurricanes\nTropical cyclones\nMesoscale convective systems\nShortwave trofs (aloft)\n\nSome meteorologists take great pride in naming them or knowing the names - which is not really the important thing, though it can help a person understand them and thus predict them better.
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The Sun.\n\nEDIT: Yes, what other people have said about the Earth's tilt and whatnot are true in that they affect the atmosphere, but you asked for the source of energy. That is solely the Sun.
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climate or atmosphere
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CS2 (g) +4H2 (g) <----> CH4 (g) +2H2S(g) \n\na) pressure of CS2 increase,    -  NO\nb) pressure of CH4 decrease,   - NO\nc) pressure of H2 decrease,     -  YES\nd) pressure of H2S decrease,   -  NO\ne) all the pressures will decrease  -  NO
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C: Barometer\n\n(  "A barometer is an instrument used to measure atmospheric pressure." http://en.wikipedia.org/wiki/Barometer  )
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The answer is Pressure\n\n10 pts plz! im only level 1!
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Pressure is basicall a fluctuation in the relative amounts of particles in any given volume. But what causes the differences in the particles per volume, The SUN. I'll ask you-what happens to a gas when the temperature is raised?\n\nThink about it, and you'll be on your way to understanding pressure.
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The weight of the air pressing down on the Earth, the ocean and on the air below causes air pressure. Earth's gravity, of course, causes the downward force that we know as "weight." Since the pressure depends upon the amount of air above the point where you're measuring the pressure, the pressure decreases as you go higher.\n\nso im guessing he talked about how in mountains, atmospheric pressure is low and high in deserts with regards to elevation. as air goes down/descends, it warms and cools as it goes up. \n\nhttp://www.usatoday.com/weather/tg/whighlow/whighlow.htm\n\nyes. froggie is right. the phenomenon is called rainshadow effect. \n\nnow i dont really know what your question is, but just a trivia. notice that on one side of tall mountain, it is high in plant life while the other is mainly desert? this is because the mountain blocks the moving air and forces it to precipitate thus causing rain which in turn supports lots of plants which support the animals.  now since the water molecules in the air was already precipitated/ let go on the one side, there is nothing left for the other side of the mountain thus the formation of deserts. so instead of formation of rain, the air starts to gather water molecules from its surroundings, depriving the plants of necessary moisture thus no plant life can be observed in most deserts. \n\nhope that helps.
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1. concentration and pressure\n2. see sources
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vacuum\ncontinuum\nperpetuum\ncarduus
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There are many properties but the two most important are:\n\n1. Temperature (cold or warm air mass) - this affects the density of the air mass as well as it's relative humidity, dew point, how it interacts with other air masses of different temperatures, etc. Temperature is the main driver for what types of weather systems will be generated within an air mass.\n\n2. Absolute humidity - the actual water content of the air mass all attributes to the types of weather systems it will generate, and where highs and lows will form.\n\nAlso, air masses can be moving or stagnant, stable or unstable, constant or dynamic, and I'm probably forgetting others.
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these are some factors that i can thought of:\n1) addition/ removal of reactants/products\n2)increase/decrease of pressure of enclosed system containing only gases\n3)increase/decrease of temperature of enclosed system(only for reaction having enthalpy change)
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Latitude, altitude, prevailing winds.