What is contracting and expanding?

Look, first of all, I do NOT want to be mean or anything ,but do your own homework! But I'll cut you some slack because I get stuck of questions too anyways, I know there are a LOT of answers you'll get but this one is sweet and short and basically sums up all the other answers. Below is the definitions that are easy to read easy to understand contracting- getting smaller expanding- getting bigger now this mostly happens because of one thing- headphone stuff contracts, it gains heat and when stuff expands, the object loses heat.

Sometimes this can be reversed.. another way to understand this is ice melting because of the sun and water freezing in the cold. Hope you get your answer right! Oh, and I don't mind if you copy me.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.