rain serves the mankind and the life on the earth in many ways explain
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Most of the Earth's surface is covered with water -- and most of it is water we can't drink. 97 percent of Earth's water is salty sea water which is useless to most land-dwelling plants and animals. That's why rain and snow are crucial to life on Earth. Precipitation supports life on land with salt-free water.
Hydrologic Cycle
Rain and snow are part of a larger process called the hydrologic cycle, which transports water from the ocean to land and back again. Solar radiation warms the ocean and drives evaporation, which leaves the ocean salt behind. The wind carries this moisture over the land, where it condenses to form clouds and falls back to the ground as precipitation. This precipitation in turn feeds lakes and streams that ultimately carry the water back to the sea. Only 0.001 percent of Earth's water is found in the atmosphere at any one time, but the atmosphere nonetheless serves as the conduit that transports water from the ocean to the mainland.
Aquatic Life
Aquatic organisms that live in fresh water, like trout and catfish in streams or aquatic plants in ponds, depend on precipitation. Without it, there would be nothing to refill the bodies of water they inhabit. That precipitation doesn't always have to take the form of rain, of course, because snow that accumulates on mountain slopes during the winter melts and feeds streams and rivers in the spring. Salt concentrations are important for many forms of life; most freshwater fish, for example, can't live in salt water and vice versa.
Hydrologic Cycle
Rain and snow are part of a larger process called the hydrologic cycle, which transports water from the ocean to land and back again. Solar radiation warms the ocean and drives evaporation, which leaves the ocean salt behind. The wind carries this moisture over the land, where it condenses to form clouds and falls back to the ground as precipitation. This precipitation in turn feeds lakes and streams that ultimately carry the water back to the sea. Only 0.001 percent of Earth's water is found in the atmosphere at any one time, but the atmosphere nonetheless serves as the conduit that transports water from the ocean to the mainland.
Aquatic Life
Aquatic organisms that live in fresh water, like trout and catfish in streams or aquatic plants in ponds, depend on precipitation. Without it, there would be nothing to refill the bodies of water they inhabit. That precipitation doesn't always have to take the form of rain, of course, because snow that accumulates on mountain slopes during the winter melts and feeds streams and rivers in the spring. Salt concentrations are important for many forms of life; most freshwater fish, for example, can't live in salt water and vice versa.
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