What Am I Riddles

Question: I am alive yet not alive. I can fly yet always on the ground. I am delicate yet can lift tonnes. What am I?

Question: I travel for miles yet stay where I am. What am I?

Question: Unexpected is my arrival. It is announced to all nearby. I protect you, yet you try to supress me. With my friends I embarrass you. What am I?

Question: I can hurt and make people bleed when I'm on the dark side, but used in good ways and I can also help you. What am I?

Question: I am the thing that is used to make your weight. What am i?