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how does snow form ? snow, the big soft flakes we are familiar with, does not begin in this state. the process of forming into snow begins high in the earth's atmosphere. the formation of these powdery flakes of snow depends on many factors taking place. moisture and temperature levels are importaint factors in the formation of snow 1) or even a small speck of dust. when there is a lot of moisture in the air, condensation stars to occur. these tiny drops of condensation stars to stick together. if the temperature in the higher atmosphere is cold enough.these tiny drops stars to freeze and become ice crystals. this is how ice crystals, and eventually snowflakes, get their varying shapes. the moisture droplets cling and freeze together randomly. 2) the drops begin to get heavier and star to fall toward the ground. these ice crystals may pass through several different degrees of temperature changes as they plummet to the ground.this is hoe they fall as rain, sleet or snow. 3) other variables affect how the snow flake will eventually have its own unique shape and design. things such as how fast the ice crystal falls to the ground and how cold the temperature is that it passes through will also effect the snow flake's final shape. 4) it may pass through surface air that is warmer or cooler. melting and refreezing will take place, causing the snow to from into many different intricate shapes, until it finally reaches the ground. 5) it continues to change shape as it melts and melds with the other snowflakes. the snowflakes then looses all of its intricate patterns. if it is warm,the snow may stars to melt and become slushy.
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最后更新： 2015-03-05
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