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for a project at school

2007-12-10 01:18:56 · 6 answers · asked by Anonymous in Science & Mathematics Weather

6 answers

1. The air is cooled below its saturation point. This happens when the air comes into contact with a cold surface or a surface that is cooling by radiation or the air is cooled by adiabatic expansion (rising). This can happen:

* along warm and cold fronts (frontal lift)
* where air flows up the side of a mountain and cools as it rises higher into the atmosphere (orographic lift)
* by the convection caused by the warming of a surface by insolation (diurnal heating)
* when warm air blows over a colder surface such as a cool body of water.

2. Clouds can be formed when two air masses below saturation point mix. Examples are: our breath on a cold day, aircraft contrails and Arctic sea smoke.

3. The air stays the same temperature but absorbs more water vapor into it until it reaches saturation point.

2007-12-10 01:28:31 · answer #1 · answered by Queen of the Tofu People 2 · 1 0

All the above. However there is one thing they left out. Water cannot form droplets by themselves. They form on mote. That's the stuff you see floating in the air when sun light shines through the window. These very fine particles are found everywhere and rise on warm air and wind currents. When they reach the clouds water atoms then have something to accumulate on and chances from water vapor to water liquid. Once liquid forms, more vapor can accumulate because it has something solid to stick to. It's like holding an object over steam. The object becomes wet from the steam, liquid forms, and drips off. One other interesting thing about moisture is that at any given time, there is 300 square miles of liquid water in the atmosphere around the world in the form of vapor, clouds, or precipitation.

2007-12-10 02:26:01 · answer #2 · answered by Jackolantern 7 · 0 0

Air contains water.It is usually in the form of an invisble gas called water vapour.When warm and moist air rises,it expands and cools.Cold air cannot hold as much water vapour as warm air.So,some of the water vapour condenses over tiny pieces of dust(called condensation nuclei) that are floating in the air and forms tiny water droplet around each dust particle.Millions of such water droplets combine together to form clouds.

2007-12-10 04:47:56 · answer #3 · answered by Arasan 7 · 0 0

1. Sunlight warms surfaces, evaporates water
2. Warm, moist layer building up in lowest 1,000 - 5,000 ft.
3. Rising air currents organize into "thermals"
4. Water vapor in rising air parcels condense to form cloud water

2007-12-10 01:44:30 · answer #4 · answered by Debbie K 2 · 0 1

My teacher thinks that the sun heats up the water and it evaporates and then it goes up and condenses and creates a clouds

2007-12-10 01:32:33 · answer #5 · answered by Bobo 1 · 0 0

clouds are made from water. water of land evaporates into a gas, then it rises into the air, and makes clouds. that's how clouds are made.

2007-12-10 01:28:30 · answer #6 · answered by christopher m 1 · 0 0

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