Answer:
My teeth are sharp my back is straight to cut things up it is my fate.
I can climb mountains, cross streams, handle hundreds of feet each day, yet I never move. What am I?
Goes over all the hills and hollows, Bites hard, but never swallows.
I like to twirl my body but keep my head up high. After I go in, everything becomes tight. What am I?
I'm white and I'm used for cutting and grinding. When I'm damaged people usually remove me. What am I?
Why is the letter B always cool?