Answers

2014-11-12T19:30:32+05:30
THE GAS FORMED DUE TO EVAPORATION IS HOT AND SO IT RISES UPWARDS PUSHING THE COLD AND DENSE AIR DOWNWARDS.THE WATER VAPOUR FORMS CLOUD AND THESE CLOUDS BURST AND FALL AS RAIN AND OTHER FORM OF PRECIPITATION.
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2014-11-12T22:42:50+05:30
The evaporation of water in sea, rivers, lakes, ponds.e.t.c.is main reason in my opinion
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