Rain is an event of the descent of water coming from the sky to the surface of the earth. Rain is also a water cycle on planet earth. Another definition of rain is an event of precipitation (the fall of liquid from the atmosphere which is liquid or frozen to the surface of the earth) in the form of liquid. Rain requires the presence of a thick layer of atmosphere so that it can meet temperatures above the melting point of ice near and above the Earth's surface. On earth, rain is a process of condensation (changes in the form of objects into a more dense form) water vapor in the atmosphere becomes granules of water that are heavy enough to fall and usually arrive on land. Two processes that may occur simultaneously can push the air more saturated before the rain, which is cooling the air or adding water vapor to the air. Raindrops have different sizes ranging from a bend (large grain), to small granules.
The process of rain is that sunlight shines on the earth, energy from sunlight causes evaporation (evaporation) in the oceans, oceans, lakes, rivers and other sources of water so that water vapor is produced. These steam will rise at a certain height and will experience an event called condensation. This condensation event is caused by the temperature around water vapor is lower than the dew point of the water vapor. Then these steam will form clouds. Then, the wind (which occurs due to differences in air pressure) will bring these water grains. These water grains will merge (this process is called coalesce) and will grow bigger due to air turbulence, these water grains will be attracted by the gravitational force of the earth so that it falls to the earth's surface. And when it falls to the surface of the earth, these water grains will pass through a warmer layer underneath. So that a small percentage of water evaporates upwards and others fall to the earth's surface as rain. This is what is called rain.
Rain has an impact on survival like farmers, this is because plants really need water to live. Ordinary rain patterns are vital for plant health, too much or too little rain can endanger or even damage the harvest. If it rains too little it will cause drought which can kill the harvest and increase erosion. Likewise if too much rain the plants will easily mold and rot.
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