Not many people think about why the rain or snow.Comes and goes, but the weather is bad, it spoils the mood.Meanwhile, it is interesting natural phenomenon that no harm will explore everything, in fact, becoming parents, people often hear such a seemingly simple question: "Why does it rain or shine?".Scarce necessarily explain all the details, but six or seven year old child is quite capable to understand the serious explanation.So it is better to know the answer to a question that the child can ask when reminded of an umbrella and bad weather.
their school chemistry course many people know that water can exist in several states of aggregation: solid, liquid and gaseous.Moreover, from a liquid to a gaseous state, it goes almost constantly, and the more intense the higher the temperature.If you leave a puddle of water on the table, after a while it dries - evaporate.Similarly, it evaporates from rivers, lakes, from the leaves of plants, soil - from all surfaces.She came back from the underground rivers and lakes that feed the rain passed before.Thus, this water evaporates and turns into steam.
But in nature everything is balanced: both cover the pan with boiling water and high in the troposphere where the temperature is significantly different from that observed near the ground, condensation, ie a drop of water.When they become too heavy, that is, they accumulate a lot, the storm clouds are formed, and then drops fall to the ground under the influence of gravity - the rain comes!Water collects in streams, rivers, eventually it can reach the remains of one of the oceans.It all starts over again.Of course, this process is described in somewhat simplified, but without any serious omissions.
This is known as cycling or swirl of water in nature.However, the latter term is somewhat incorrect, as the whirlpool is commonly referred to another phenomenon which has no relationship to the precipitation.
All this little story explains why the rain.Sometimes, instead of it is snowing, it is water droplets freeze and become snowflakes - ice crystals.Castle - even more interesting phenomenon, it occurs when the condensate, ie water droplets collide with a very cold air, while some may be frozen, but not to become snowflakes and turn into hailstones.Large hailstones can be formed if the cloud has a strong updraft, which does not allow precipitation to fall quite a long time.When it is cold cloud encounters warmer air begins thunderstorm, hail falls.This phenomenon, however, is not to be confused with freezing rain, snow pellets, or sleet - they are very different.
After the rain, especially if the weather is warm, even hot, you can see a rainbow.When the rain mushroom, that is, the sun is hidden behind clouds, it can be seen directly in the rain.It appears that through small droplets of falling water evaporating or the sun shines.This is a beautiful natural phenomenon really like children, so sometimes the question: "Why does it rain?"- You can even respond: "To the people saw a rainbow."
