Liquid keeps its shape fixed.

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Fish and other water animals use the dissolved air for _____. (Breathing/ Preparing food)

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The changes in nature may be physical or _____.

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Any change in the shape, size or state of a substance is called a _____ change.

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Any change in which the composition of a substance changes permanently is called a _____. (Physical change/ Chemical change)

Fill in the blank space with the right word.

During a _____ change new substance is formed.