what are the two main factors of air pressure in the atmosphere?
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Actually standard pressure at sea level is taken to be 14.7 lbs/in^2. \n\nLots of things are factors in air pressure: \n\nAltitude of observations \n\nHeight of air column\n\ndensity of air, depending on temperature, and gas constitutents (constituents usually fairly slowly varying, but temperature varies rapidly)\n\nStrength of gravitational field\n\nTidal forces (small but measurable)\n\nLocal topography (orographic effects)\n\nair motion (usually driven by density differences, which are usually connected with tempearture). \n\n\n\nProbably the biggest factors are temperature, and altitude.
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atmospheric pressure decreases as altitude increases.\n(think about gravity)\n\nan object that floats is less dense than the fluid it floats in.\n"A piece of the object weighs less than a piece of the fluid the same size."
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Low pressure is related with storms\nHigh pressure is related with good weather\n\nThe way i understood is... that is a measure of air pressure\nif its sunny then all the air above is pushing down\n\nif there are storms there is water and stuff in the air taking up space therefore less air pushing down \n\ndoes that make sense
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Carbon Dioxide\nMethane\nWater Vapor
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The answer is C - It does not rise and produce high pressure.  As the air mass moves north, it cools off.  Remember that hot air rises, so the opposite is true for air that is cooling off - it stays low.\n\nTropical air mass is warm and moist, it has strong winds in the centre and can turn into hurricanes.  Good luck.
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Atmospheric Pressure \nforce exerted by the weight of the air \n\nAtmospheric pressure is defined as the force per unit area exerted against a surface by the weight of the air above that surface. In the diagram below, the pressure at point "X" increases as the weight of the air above it increases. The same can be said about decreasing pressure, where the pressure at point "X" decreases if the weight of the air above it also decreases
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There are a lot of great sites that give basic weather predicting information.\n\nDifferences in air pressure are what causes the fronts--high and low pressure. High pressure areas generally have dry, good weather and areas of low pressure have precipitation.
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Pressure increases as altitude increases. Also, underwater, when elevation decreases.
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Atmosphere\nPascal\nBar\nlbs/cm^2
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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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air naturally comes from high pressure fronts to low pressure fronts\n\nalso if you look at weather maps those wierd looking squiggly lines \nthe closer together they are the higher wind speed you'll have
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Nitrogen is the most abundent element in our atmosphere.  Bacteria gets N2 from the air.
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differece in air pressure from different spots in the world. some high some low as they all try to form a balance this creates wind. air pressure can be affected by temperature
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Air Pressure.  The humidity and such in the air is higher and therefore holds more warmth.\n\nAt higher altitudes, where the air is less dense, there is greater distance between particulates and heat is lost faster.
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Primary(aprox. 46 billion years ago) atmhosphere was included hydrogen, helium and ammonia. \nSecondary (current) atmosphere eveolved as volcanic activity added nitrogen, water vapor and CO2 to the atmosphere. And appearance of green plants added free oxygen to the air. \nAdditionally there are some variable components of atmosphere:two imporatnt ones; water vapor and ozone. Permanent compnonets are NITROGEN, OXYGEN, ARGON and CO2.
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Atmospheric pressure at sea level is caused by the weight of the atmosphere pushing downward. (weight /area).\n\nIf you approximate the Earth as a sphere, calculate the surface area of the sphere, and then multiply the pressure times the area you will get an approximation for the weight of the atmosphere.\n\nStandard pressure is 100 kPa. \nThe Earth's equatorial radius is roughly 6400 km\n\nSurface Area of a sphere is 4*pi*r^2 = pi*d^2\n\nMass = A*P
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1)typical atmospheric pressure is 1atmosphere or 10^2kilopascals or 760mmHg.\n2)Atmospheric pressure decreases with altitude.So external pressure decreases.As preessure decreases volume increases(if the temperature change is insignificant)\n3)Water pressure increases with depth (P=h*density*g).So as external pressure increases the volumme decreases.\n4)Here we assume that the temperature doesn't change in the process.Use Boyle's law PV=P'V'\nso 760*V=1.30*0.21\nwhich gives V=3.59*10^-4L