What makes the snow melt on grass even if it is cold enough to freeze?

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Trevor

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Trevor asked the Naked Scientists:
   
What makes the snow melt on grass even if it is cold enough to freeze?

What do you think?
« Last Edit: 27/11/2010 16:30:05 by _system »

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SteveFish

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If the ground is not frozen, it will be radiating its heat upward and melt the snow just like on the roofs of houses that have poor insulation.