What is rain?

Marina Fedotova
Marina Fedotova
March 13, 2013
What is rain?

On our planet there are many natural phenomena (tornado, thunderstorms, drought), one of them is rain. Thanks to him, plants receive the necessary amount of moisture, which contributes to their growth and development.

In our article we will try to explain what rain is, how is it formed? Rain is precipitation that falls in the form of moisture (droplets), droplets can reach up to one centimeter in diameter (depending on the intensity of rain). As for the intensity of precipitation, here we can distinguish such a thing as drizzle, this is a well-known, rather unpleasant phenomenon. When drizzle, precipitation is very small and similar to the mist. Most often the drizzle is formed from low stratus clouds or from fog.

In order to fully understand what is rain, you need to understand how this atmospheric phenomenon is formed. Rain formation occurs as follows:

  • Rain falls from stratus clouds, at first the droplets are in the form of crystals that are in this state due to the low temperature in the cloud.
  • Moving in this air flow, the crystals of moisture begin to harden, grow heavy. As a result, clouds begin to move down, where they still freeze moisture with a higher temperature. Under the influence of gravity, its mass and changing temperature, the crystals begin to drop from the cloud and turn into raindrops.

It is clear that the rain came, we need specific conditions. Being in the lower layers of the atmosphere, water (moisture) is in its three aggregative states and therefore it is very easy to change its appearance (from the gaseous state to the rain drops). It should be noted that rainfall depends on the terrain.