Give one word for the following.
(a) a solid becoming a liquid
(b) a vapour becoming a liquid
(c) a change which occurs again and again
(d) a change in which the original substance can be got back easily
(e) a liquid becoming a solid
(f) a change in which a new substance is formed
(g) a change in which a solid directly changes into vapour
(h) a liquid changing to vapour
(i) changes that happen over and over again in a certain pattern

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Solution

(a) Melting
(b) Condensation
(c) Periodic change
(d) Reversible change
(e) Freezing
(f) Chemical change
(g) Sublimation
(h) Evaporation
(i) Periodic change

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