Clouds are made up of millons of water droplets and tiny pieces of ice called ice crystals., The water droplets and ice crystals are so small that the air holds them up., Sometimes, the droplets and crystals bump into each other and join together., As the droplets and crystals get bigger, they become too heavy for the air to hold. , Then they fall to the ground., Water that falls from the clouds is called precipitation., There are different kinds of precipitation., Rain, snow, sleet and hail.,

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