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Answers
Step-by-step explanation:
I.
a)In a chemical reaction, there is a change in the composition of the substances in question.
In a chemical reaction, there is a change in the composition of the substances in question. In a physical change there is no a change in composition.
b)Expansion- to fit a metal rim on a wooden wheel which is smaller than the wheel by heating it.
Conttaction- pouring cool water over a metal rim, makes it contract & fit in wheel.
c)Change occurs when a new substance is formed through a reaction like when fruit ripens or rots.
II.
a)A reversible change is a chemical change where no new materials are created and the original material can be recovered.
b)The action of becoming bigger or the state of being bigger than before.
c) The process which is done to achieve faster and more uniform ripening characteristics at the cost of its Nutritional Values.
III.
a)Contracts
b)liquid
c)decreases
d)chemical change
e)chemical changr