Rain falls when atmospheric water vapor falls under gravity. In other words, when the water vapor in the atmosphere becomes too heavy, rain falls. More »

Rain occurs when the water held in warm, damp air condenses and falls. The primary difference between light rain and heavy rain is the amount of moisture that is present in the air mass, which is proportional to the size... More »

Several chemicals cause acid rain, although sulfur dioxide and nitrogen oxide are the primary contributors. Sulfur dioxide and nitrogen oxide contribute largely to the development of acid rain, although several natural s... More »

Rain is the result of water droplets gathering together in clouds and gravity causing the water droplets to fall as rain. Warm air has more water droplets than cold air. More »

Rain and other forms of precipitation fall from the clouds. When warm air passes over a body of water, it causes the water to evaporate. Once the water rises high enough, it clumps with other water vapor and becomes a cl... More »

Rain occurs when the water held in warm, damp air condenses and falls. The primary difference between light rain and heavy rain is the amount of moisture that is present in the air mass, which is proportional to the size... More »

Precipitation occurs when water-laden air cools, causing the water to condense back into its liquid form and fall as rain. In order to acquire the water in the first place, warm air must flow over a body of water. When t... More »