Good Riddles

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?

Question: i have a house but it doesnt have a door?

Question: If green means go, yellow means slow down or caution, and red means stop. Why can't traffic lights go when they turn to green?

Question: Mike has a father named BOB. Bob is the......... of mike's fatfer

Question: There is this man how lives in a hotel , in sunny days he goes up the stairs to his hotel room and on rainy days he uses the elevator why?