I can fill a room but take up no space. What am I?

I am not alive, yet I grow. I have no lungs, yet I need air. I have no mouth, yet water kills me. What am I?

The more of me there is, the less you can see. What am I?

Born in the ocean, raised by the sun, when I return to the ocean my life is done. What am I?

I eat everything and never get full. I drink everything and always feel dry. What am I?

Three lives have I. Gentle enough to soothe the skin, light enough to fly in the sky, hard enough to crack a rock. What am I?