Answer:
I'm white and used for cutting and grinding. When I'm damaged, humans usually remove or fill me. For most animals I am a useful tool. What am I?
If you look, you cannot see me. And if you see me, you cannot see anything else. I can make anything you want happen, but later everything goes back to normal. What am I?
I am longer than a decade and shorter than a millennium
What has a thumb and four fingers but is not alive?
I sit high glowing and watch the world go by. Without me everything would seem dull and dangerous. What am I?
What never gets any wetter no matter how hard it rains?