Question

Give 2 Examples for expansion and contraction

Answer 1

Answer:

Examples of expansion and contraction:

If we hold a very hot glass tumbler under cold water. it cracks. This is because the outer surface of the glass comes in direct contact with cold water and contracts more as compared to the inner surface. Water expands on heating try this with the help of an adult.

Explanation:

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Answer 2

Explanation:

Our muscle expand contract

Heart expand and contract

These are the examples

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