When ice melts, it changes from solid to liquid. When water boils, it becomes vapour. These activities show how water changes its form due to heat—called melting and evaporation.
Class 5 Our Wondrous World – The World Around Us – Chapter 1 Water–The Essence of Life question answer
Class 5 NCERT EVS Our Wondrous World Chapter 1 Water-The Essence of Life solutions
Two state changes are observed: first, melting—where solid ice turns into liquid water due to heat; and second, evaporation—where liquid water becomes steam or vapour when boiled. These experiments show that water can change between solid, liquid and gas forms with temperature changes. Such changes are part of the water cycle in nature and help us understand how clouds, rain and rivers form.
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