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

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?

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