AP chem help please!?

Exothermic means heat is given off from the system to the surroundings. Endothermic means that heat is taken into the system from the surroundings. A change of state is the process of going from solid to liquid, or liquid to gas, or solid to gas, etc. If you want ALL the changes of state, just think of all the different states, such as gas, liquid, solid, plasma, etc, and then look at all the combinations and permutations.

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.