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When the sun heats up bodies of water and the molecules dance so fast that they turn into water vapor.
Up in the clouds, the air is cold so that makes the molecules dance slower and turns back into liquid form.
The clouds are filled with so much liquid that it cannot hold it anymore and pours down to the ground. This includes sleet, hail, snow or rain.
The temperature at which water vapor in the air becomes saturated and water droplets begin to form.
The percentage of water vapor in the air compared to the maximum amount the air can hold.
Pressure caused by the weight of the atmosphere. It decreases with increasing altitude.
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