Question

difference between expansion and contraction give atleast 7 point don't give one pls
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Answer 1

Answer:

The increase in the size of an object on heating called expansion. Whereas,The decrease in size of an object on cooling called contraction. An example of an expansion is an extra three rooms build onto a house whereas,An example of contraction in a liquid is a thermometer.

Sorry Bro but I can't tell 7 points because I don't know.