Snow

Snow

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Credit: CLAUDE NURIDSANY & MARIE PERENNOU/ SCIENCE PHOTO LIBRARY

Caption: Snow falls to the ground at night when temperatures are lowest. The ground snow fall here comprises numerous snow crystals, all exhibiting characteristic hexagonal symmetry. The crystals are made up of water molecules consisting of 2 hydrogen atoms making an angle of 105 degrees with 1 oxygen atom. This fixed shape imposes hexagonal symmetry on the snow crystals & hence a 6-branched figure results. No two snowflakes are identical despite this hexagonal structure, since molecular arrangement is also determined by atmospheric conditions eg. temperature, humidity, air currents & these are never identical for two snowflakes.

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Keywords: climate, cold, frozen, meteorology, snow, weather, winter

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