where does water vapor in the air come from?
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(m)\n\nThe amount of moisture air can retain is determined by its temperature and, to a lesser extent, its pressure. Any sufficient drop in temperature or increase in pressure will cause moisture to condense out of the air. \n\n \n\n Relative humidity is the amount of moisture that is present in the air, compared to the total amount the air could hold at a certain temperature. For example: One cubic foot of air at 80°F, 27°C can hold about 12 grains of moisture.\n\nIf it is holding all 12 grains, it is said to be at 100% relative humidity or saturated. If that same cubic foot of air is holding only 6 grains of moisture, it is at 50% relative humidity.\n  \n Saturation point is the point at which air is holding all the water vapor it can (100% relative humidity). If we added more water vapor to saturated air, the water vapor would condense into a liquid.\n\nRemember that a drop in temperature or increase in pressure will cause moisture to condense out of air that is saturated.\n \n\n  Condensation is the changing of water vapor into a liquid.\n\nDew point is the temperature at which water vapor in the air condenses into a liquid.\n \nPressure dew point is more meaningful because it indicates, at a given pressure, the temperature at which condensate forms in the compressed air lines.
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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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There are an estimated 325 to 330 million cubic miles of water on Earth, and of that about 3,100 cubic miles exists as water vapor in the atmosphere.\n\nSo the answer to your question is "Nay nay", but it was a good question.
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Evaporation. The sun's heat turns water into vapour.
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Winds pick up water vapor as they blow across oceans, and drop the water as rain as they blow across islands and  continents, generally losing more water as the elevation rises.  \n\nAs the air and clouds blow over higher ground, the temperature drops and causes the water to precipitate, forming rain.  There is a "rain shadow," on the leeward side of the higher ground in the center of an island or continent, because the clouds drop the rain on the "windward" side of a mountain (side toward the wind), leaving the "leeward" side drier (side that's sheltered from the wind).\n\nThe winds blowing across the ocean pick up water and bring rain to India, bringing more rain as they first come to the land, raining as the elevation rises, and then raining less after they cross the higher ground in the central parts of India. \n\nHope this helps.
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Generaly what appear to be air bubble is actually vaporized water molecules. \nAt the boiling point high energy molecules of water convert to gasious state and thus they look in the form of bubble. As the water vapours are transparent like air we assume the bubbles to be made of air but actually the bubbles are filled with water vapours.\n\nHowever, in the very early stage of heating water the dissolved air scapes from water. Usually this escaping air does not form bubbles but sometimes tiny bubbles are also formed. Nevertheless, this happens much before actual boiling.
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did you mean how do clouds form?\n\nIf so, they form from water evaporating on the surface of the earth. As the vapour rises, it reaches cooler, higher areas of the atmosphere and the vapour begins to condense, around microscopic particles in the air. Once this process has started, other molecules will start to join in, until the vapour condenses and clumps together. When enough forms, it is no longer lighter than air, and rain will occur.
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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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Moisture in the air. Scientific meaning? Humid conditions.\nMythical? Don't know.
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evaporation would need to something for this to happen then where would the vapor go the chances of oceans drying up in our life times of the human race is nill if it happened the cause would have finished us long before have you any more stupid questions
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You can observe this yourself by breathing on a mirror. As the condensation evaporates from the mirror, you have completed the water cycle. Water evaporates into the atmosphere from the ocean, lakes, rivers, and from soil and plants, and even from your skin and breath. When the air reaches saturation (100% humidity) due to cooling or changes in atmospheric pressure (or both) the water condenses from vapor to liquid (or solid) and falls to earth as rain, snow, sleet, hail, or maybe only as dew. This water may then form streams and rivers and return to the ocean where it may evaporate again into the atmosphere or it may sink into the earth where it becomes groundwater that may take many thousands of years to emerge again, or may be pumped to the surface from a well and used for drinking water or irrigation. It is a continuous cycle that may take only seconds or may take thousands of years to complete the cycle depending on the path of the water.
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Clouds are formed by water vapor. And high pressure can hold more water vapor. So when vapor moves into a low pressure system it condenses and and forms clouds and those clouds precipitate when the system cant hold no more water vapor
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You can observe this yourself by breathing on a mirror. As the condensation evaporates from the mirror, you have completed the water cycle. Water evaporates into the atmosphere from the ocean, lakes, rivers, and from soil and plants, and even from your skin and breath. When the air reaches saturation (100% humidity) due to cooling or changes in atmospheric pressure (or both) the water condenses  from vapor to liquid (or solid) and falls to earth as rain, snow, sleet, hail, or maybe only as dew. This water may then form streams and rivers and return to the ocean where it may evaporate again into the atmosphere or it may sink into the earth where it becomes groundwater that may take many thousands of years to emerge again, or may be pumped to the surface from a well and used for drinking water or irrigation. It is a continuous cycle that may take only seconds or may take thousands of years to complete the cycle depending on the path of the water.   \n\nWhy do I get the feeling I'm answering your homework question? Now if you'd asked about delta O18 (a heavy isotope of oxygen) I could have told you how the water cycle concentrates water composed of hydrogen and heavy oxygen atoms and how this is used to study paleoclimates using ice cores and sea shells. Have a good day.
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Our atmosphere -- the gaseous envelope surrounding the Earth -- is composed of several gases, primarily nitrogen, oxygen, argon and carbon dioxide. Water vapor and minute bits of dust, salt and clay-silicate particles swirl about in the mixture.\nThe atmosphere has four vertical layers that radiate from Earth and vary by temperature and composition. Proceeding from the ground outward, they are the troposphere, stratosphere, mesosphere and thermosphere.\n\n\nAll of the “optical phenomena” – halos, sun dogs, sun pillars, coronas and rainbows – are produced at specific levels in the troposphere, which extends from the surface up to about 12 kilometers, eight miles or 42,000 feet depending on which measuring stick you pick. Here, the temperature decreases rapidly with altitude – averaging 59°F at the surface and a right chilly -69°F at 11 km. Commercial jets fly in the upper reaches of the troposphere.\n\n\nHigh-level cirrus clouds form in extremely cold air where water vapor condenses on tiny dust and salt particles to form ice \ncrystals.\nHence these are responsible for various phenomena circles aroound light emitting/reflecting bodies on the sky, and the rings are formed depending upon how the light gets scattered and the colours also depend on that.\nVR
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The clouds floating overhead contain water vapor and cloud droplets, which are small drops of condensed water. These droplets are way too small to fall as precipitation, but they are large enough to form visible clouds. Water is continually evaporating and condensing in the sky. If you look closely at a cloud you can see some parts disappearing (evaporating) while other parts are growing (condensation). Most of the condensed water in clouds does not fall as precipitation because their fall speed is not large enough to overcome updrafts which support the clouds. For precipitation to happen, first tiny water droplets must condense on even tinier dust, salt, or smoke particles, which act as a nucleus. Water droplets may grow as a result of additional condensation of water vapor when the particles collide. If enough collisions occur to produce a droplet with a fall velocity which exceeds the cloud updraft speed, then it will fall out of the cloud as precipitation. This is not a trivial task since millions of cloud droplets are required to produce a single raindrop. A more efficient mechanism (known as the Bergeron-Findeisen process) for producing a precipitation-sized drop is through a process which leads to the rapid growth of ice crystals at the expense of the water vapor present in a cloud. These crystals may fall as snow, or melt and fall as rain.
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What is air?  It is a mixture of gases, trapped in the gravity of the Earth, that form an envelope around our planet.  It is a mixture of nitrogen (~78%), oxygen (~21%), and the rest small amounts of carbon dioxide, water vapor, argon, neon, carbon monoxide, and traces of other gases.\n\nIf there were no nuclei present, there would be no matter present, and that is the definition of a vacuum.
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rain comes from clouds. clouds are actually water vapour floating in air. when they become really condensed due to a drop in temperature then they form large drop of water which cant stay afloat and so rain happens.