What Am I Riddles

Question: It dies when it's hot, exists when it's cold, you can touch it, but you cannot bounce it, and it doesn't give you any gold. What am I?

Question: You wait for it. It cracks, stays for a moment, and then vanishes before your eyes. What is it?

Question: Voiceless it cries,
Wingless flutters,
Toothless bites,
Mouthless mutters.

What is it?

Question: I am there !!! but I was!!!

Question: What is as big as you are and yet does not weigh anything?