Question

Q. What is the meaning of expansion and contraction phenomenon??



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Answer 1

Answer:

explainsion - it Means to increased something in size

Explanation:

contraction - it Means to decrease the size on an object

Answer 2

answer : when heat is added to any particles there kenetic energy or their moving energy is encreased when this happens the particals move further away from each other. this happens because the molecular bonds between these particles. as they move further away fromeach other the substance takes up more space this is called expansion.

when heat is removed from a substance the particles Slow Down And Move closer together this means the substance take up less space. this is called contraction.

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