What Am I Riddles

Question: I rise and fall no matter what, only at finals rest do I not budge, what am I?

Question: I am in everything and in nothing, what am I?

Question: Some people peel my skin some people don't, you eat me nevertheless, with or without, what am I?

Question: At first I'm in pieces, but you build me and I carry you, at night when your tired or sleepy or even drunk, what am I?

Question: I'm not dead i'm not alive, i'm not underground i'm high up in the sky, people speak of me but never saw me. Who am i?