How many layers are in the part of this geological column you modeled?

What is a compass? how does it work

Where does the availability of water pose the greatest problem

The map above shows where people live in the united states. areas that are darker blue are areas where people live close together. areas that are lighter colors are places where people live farther apart. as a geographer, if you were to study where people live and why they choose to live in these places, which of the six essential elements of geography would you be using?