Good Mom? what do you know about states of matter?
Well solid is the start of matter and the molecules in a solid moves fast and the molecules also touches each other. And if you put a solid in a pot such as ice it endothermic reaction in to a liquid.
And what about liquid& gas?
Well when liquids evaporate and turns in to gas. Gas molecules moves slow and they don't touch each other. They have more space and when you turn the exothermic reaction off and let the liquid chill in the freezer it turns into a solid.
Thanks mom i'm sure i'm going to past my test now.