Tuesday, December 21, 2010
2. Every snowflake is symmetrical. When you examine individual flakes, some will be unsymmetrical, but this is because they have been damaged. Scientists are not certain why the crystals form symmetrically, though there are theories about surface tension and microcosmic fluctuations in temperature. (Huh?)
4. Big snow. Snow takes up eight times as much space as liquid water. Try it for yourself: if you put eight inches of snow in a straight-sided glass and take it inside, you should have roughly one inch of water when it melts.
9. Where did the snow go? Even if temperatures remain stable, snow does not. If it only snowed once but the temperature remained below freezing, the snow would disappear over time owing to a process called sublimation. Sublimation, essentially, is the phenomenon where a solid (the snow) changes to a gas (water vapour) without passing through a liquid state. For deeper explanation than that, you'll have to consult a chemist!