Answer:
I have no life but I can die. What am I?
By Moon or by Sun, I shall be found. Yet, if there's no light around, I am undone. What am I?
I turn everything around but I cannot move. When you see me you see you!
What body part is pronounced as one letter, but written with three, only two different letters are used?
I give people a huge fright, but at the end I'm sweet. I normally celebrate at night, when there's less heat. What am I?
No matter how little or how much you use me, you change me every month.