What Am I Riddles

Question: I climb to the top I dive below I return again For another show.

Question: I'm as small as an ant, as big as a whale. I'll approach like a breeze, but can come like a gale. By some I get hit, but all have shown fear. I'll dance to the music, though I can't hear. Of names I have many, of names I have one. I'm as slow as a snail, but from me you can't run.

Question: what does not move outside (the surface)but moves inside ?

Question: I never was. Am always to be. No one ever saw me, nor ever will. And yet I am the confidence of all who live and breathe. What am I ?

Question: What stays where it is when it goes off?