Question

define. contraction, Expansion, Melting

Answer 1

Please find below the solutions of your asked queries:Contraction: Contraction is  the decreasing of size in solids when cooled. It occurs when the temperature decreases.Evaporation: Changing of a liquid into gaseous form is called evaporation. In this method the mixture is heated. The liquid part of the mixture evaporates and escapes, leaving the solid part behind. For example- a mixture of common salt and water can be separated by evaporation.Expansion: It is a phenomenon which involves the action of becoming larger or spreading out or an act of  relaxation or increase or enlargement. In expansion, a substance or nature is increased in shape, size, scope or quantity. It is just opposite to the contraction.Melting: The process of solid material changing to its liquid form is called melting. For example- Ice turning into water, Iron metal turning into iron ore (liquid form), etc.Hope this information clears your doubts about the topic.

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