Since the crust floats on top of liquid and flowing upper mantle, what inference can be made about the density of the two layers?

When studying the calumet region of illinois and indiana alfred meyers noted four stages of development as new groups occupied this land in stage 2 farmers used the land primarily to grow food for their familes and their small communities

According ti the following map, what are the most common mineral resources found in the united states?

What distinguishes monsoon asia from the remainder of asia? what are the consequent differences between the two?