How does dry ice turn into carbon dioxide

Dry ice doesn't melt and turn into a liquid at all, compared to ice-cubes that melt into a drink. In fact, dry ice doesn't melt. It sublimates. This means that it turns from a solid into a gas. So in this case, dry ice turns into carbon dioxide.

Dry-ice ---> Carbon dioxide

solid     --->         gas  

[Sublimation - the process in which a solid turns into a gas.]

I hope this helps!

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).