Answer:
I'm not alive but I grow I don't have lungs but I need air I don't have a mouth but water can kill me. What am I?
I tremble at each breath of air, and yet can heaviest burdens bear. What am I?
Some try to hide, some try to cheat, but time will show we always will meet.
I come without being fetched at night hides away as soon as daylight strikes. Although I may look small I am much mightier than what you can imagine.
What gets wetter as it dries?
What an fill a room but takes up no space?