Children are able to matters greatly perplex parents and other adults, "Why is the sky above us blue?", "Why is the sun shining?", "Why is the river flows?" ... In winter, a favorite child's question: "Why is snow white, crunches and squeaksunder your feet? "And it should deal with this interest just because the current winter - not the last, and if to hush up the issue now, it will fall to parents only one year.
Color snow
Why snow crunches under our feet, we shall understand a little later, to determine the first with the first part of the question.Children who are ripe for it, it is already known that the snow - this frozen water that is ice.Ice is transparent, respectively - a colorless, so why all the snow white?
If you catch a snowflake and peer closely into it, we can easily see that it is mostly transparent, too.Color it acquires only when its facets reflect the light - it's like the sun or artificial.And if the snowflakes neatly folded pile, they appeared to be clear, it is that the faces be painted - in the color of the sky or the nearest advertising billboards.However, the snow falls randomly substituted verge of the sun at different angles, reflect and refract it again chaotic.As a result, the eyes perceive as the ideal svezhenapadavshy snow white (of course, if no clouds in the sky).
When the snow crunches
Now you know why the snow crunching underfoot.Remembering that represent a snowflakes icicles, the answer is not too difficult to give.The ice crystals, they are quite fragile, although solid.When the pressure on them (for example, under the weight of a person walking in the snow) snowflakes destroyed, making barely audible crunch.He was accompanied by the same almost (but only almost!) Silent creaking from the friction of tiny pieces of ice about one another.If it broke down just one snowflake, the human ear would not be able to hear the sound is so quiet.However, their tens of thousands, or even millions - and crunch grinds to become audible.In addition, between the individual snowflakes in snow frost appear very thin connection, bridges, invisible to the eye, but is added to the noise of his touch.
When the snow creaks
offspring are not always satisfactory answer, either find it abstruse, or it does not coincide with their vision of the world.However, more often occur following questions logically follow from your explanation, "But then why did the snow crunches under your feet in the cold, and when it is not very cold - no?" First of all, because the snowflakes with minor colds become more flexible, resilient and break notimmediately - many under pressure from time to melt.Friction between individual crystals is also absent - it is "smeared" water, which has no time to freeze.Bridges-layer is also not formed, so that there is nothing to burst.Accordingly, the question: "Why is the snow crunches under the feet" of the child, coming nowhere near there.However, just before the next cold snap!
However, parents explain why the snow crunches underfoot and lightweight utershim sweat from his brow, not relax.Very soon, their child will please them the next question - and who knows how to successfully get an answer.
