Ice breakers

I speak without a mouth and hear without ears. I have no body, but I come alive with the wind. What am I?

What has keys but can't open locks?

The more you take, the more you leave behind. What am I?

What has a head, a tail, is brown, and has no legs?

What has a neck but no head?

What has cities, but no houses; forests, but no trees; and rivers, but no water?

What has a heart that doesn't beat?

What has one eye but can't see?

I am taken from a mine, and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

What has a thumb and four fingers but is not alive?