Note: This question is a bit vague and incomplete, but I will answer it anyway.
I learned a lot from this lesson and many of the information are the ones that I know. First I know that in order for a matter to change its state like liquid, it should reach a freezing point where it will start to become frozen solid, and for it to melt like almost all solids, it must be exposed to heat or warm atmosphere. Finally I know that for a liquid to become gas, it should be heated as well to evaporate and turn into water vapour. Now you know something I know, and I am very happy to impart and share it with you.
#CarryOnLearning