Water as a Resource

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Evaporation is the process where water turns into water vapour when heated by the Sun. For example, water from ponds and lakes dries up in summer due to evaporation.

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Condensation is when water vapour cools down and turns back into water. For example, tiny water drops form on the outside of a cold glass on a hot day.

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These droplets are called dew. They form when water vapour in the air cools down at night and condenses on cold leaves and grass.

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Water evaporates into steam. When the steam touches the cold lid, it condenses into water droplets. This shows both evaporation and condensation.

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The water cycle is the continuous movement of water between the Earth and the atmosphere through evaporation, condensation, and rainfall.

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Water evaporates from rivers and oceans, rises as vapour, cools and condenses into clouds. When the droplets become heavy, they fall as rain.

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1. Evaporation – water turns into vapour. 2. Condensation – vapour forms clouds. 3. Precipitation – water falls as rain or snow.

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Some rainwater soaks into the ground and becomes groundwater. This water is stored underground and can be pumped out for use.