The tall dark storm clouds may hold a great deal of water, but only the big drops at the bottom of the could actually fall as rain. The small light particles of water rise upwards to form snowflakes and hailstones. Sometimes, there may also be thunder and lightning, due to a build up of electricity. Storm clouds are called ‘cumulonimbus’ by weather forecasters. Lightning, caused by the electricity stored in a cloud may strike from outside a cloud, from one cloud to another or from the cloud to the ground. Lightning flashes can be six kilometers long and pack a hundred million volts. This causes an explosion in the air, which we call thunder. As light travels faster than sound, we see the lightning before we hear the thunder. When the water droplets at the top of a storm cloud are cooled to a low degree, they freeze while bumping into the ice-crystals, also in the clouds. After these become larger and heavier, they fall as hail. Hail-stones never fall over the Poles , as the storm clouds there are not large enough , due to cold air. Some people have suggested that, if our hair suddenly stands on end, there will be lightning in two or three seconds. - SUMMARY WRITING. SUMMARISE THIS PARAGRAPH
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Along with evaporation and condensation, precipitation is one of the three major parts of the global water cycle. Precipitation forms in the clouds when water vapor condenses into bigger and bigger droplets of water. When the drops are heavy enough, they fall to the Earth.07-Aug-2019
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