Why do icicles appear?
It would seem that the usual phenomenon for each spring, icicles hang from the roofs of houses, the sun is shining. But did you think about the reasons, why icicles appear?
In fact, you can not name the only reason for the appearance of icicles ...
- On the roof is a layer of snow. Downstairs warm attic. That is, the lower layer of snow is heated, the snow begins to melt, and thin streams of water flow down to the eaves. Slowly dripping down from the frosty air, they freeze, so icicles appear.
- If the side of the roof is southern, the sun shines on it, and the snow begins to melt a little, even in the cold. But only a shadow appears, the water immediately turns into icicles.
- What to say about spring! Thaw comes, everything melts. Exposure to warm air, the heated roof from the sun - all contribute to the appearance of icicles.