Question

what is expansion and contraction?

please answer very urgent .

anybone who answer first will mark as the brainliest.

THANKYOU ​

Answer 1

Answer:

• The increase in size of an object on heating is called expansion.
• Decrease in size of an object on cooling is called contraction.

Answer 2

Explanation:

the increase of a material on heating is called expansion and if the material decrease in size when cooled at low temperature is not as contraction