What Am I Riddles

Question: I am flat, I am sharp; but I cannot hurt you. What am I?

Question: i can fill up the entire room and still not take up any space. Who am i?

Question: i am boiling hot and freezing col at the same time what am i?

Question: It flies, it walks, it runs on land, It takes, it gives, but without hands, It carries and delights, Falls and frights. Normally a creature of white it is. What is it?

Question: Body of Steel Spits out Fire Feared by Man No Trace of Wire