Not many people think about why it rains or snows. Going and going, only the weather is bad, it spoils the mood. And yet this is an interesting natural phenomenon that everyone will need to study, because when they become parents, people often hear such seemingly simple questions: "Why is it raining or does the sun shine?" It is not necessary for crumbs to explain everything in detail, but a six- or seven-year-old child is already quite capable of understanding a serious explanation. So it’s better to know the answer to a question that a child can ask when reminding about an umbrella and bad weather.
Many people know their school chemistry course that water can stay in several aggregate states: solid, liquid and gaseous. Moreover, from a liquid to a gaseous state, it passes almost constantly and the more intense, the higher its temperature. If you leave a puddle of water on the table, after a while it will dry - it will evaporate. In the same way, it evaporates from rivers, lakes, from leaves of plants, soil - from any surface. She got there from underground rivers and lakes, which are fed by the rain that has passed before. So, this water evaporates, turns into water vapor.
But in nature, everything is balanced: both on the lid of the pot with boiling water, and high in the troposphere, where the air temperature is significantly different from that observed near the ground, condensation forms, that is, drops of water. When they become very heavy, that is, they accumulate a lot,
thunderclouds form
, and then the drops fall to the ground under the influence of gravity - it is raining! Water collects in streams, streams, in the end its remnants can reach one of the oceans. It all starts all over again. Of course, this process is described somewhat simplistically, but without serious omissions.
This phenomenon is known as the cycle or swirl of water in nature. However, the latter term is somewhat incorrect, since a whirlpool is usually called another phenomenon that has no relation to precipitation.
This whole short story explains why it rains. Sometimes it snows instead, it drops water and becomes snowflakes - ice crystals. Hail is an even more interesting phenomenon, it occurs when condensate, that is, water droplets collide with very cold air, then some of them can freeze, but not become snowflakes, but turn into gradients. Large
hail can form if there is a strong
upward flow of air in the cloud, which prevents precipitation from falling out for a rather long time. When this cold cloud collides with warmer air, a thunderstorm begins, hail falls. This phenomenon, however, should not be confused with
ice rain, snow pellets or rain with snow - they differ significantly.
After rain, especially if the weather is warm, even hot, you can see a rainbow. When the rain is mushroom, that is, the sun is not hidden behind the clouds, it can be seen right in the rain. It appears when the sun shines through small droplets of evaporating or falling water. This beautiful natural phenomenon is very popular with children, so sometimes the question: "Why is it raining?" - you can even answer: "So that people see the rainbow."