Frost is frozen moisture. It forms when invisible water vapour in the air changes directly from a gas-like state into ice crystals. In mountains, moisture in cracks in rocks freezes at night. Because ice occupies more space than water, the ice exerts a wedge like pressure inside the cracks, widening them until the rocks split. This is called frost action.
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Raja Ram Mohan Roy, a great social reformer was born on 22 of May in …