Which map depicts elevation changes on earth's surface?
a. political
b. road map
c. topographic map?

At which point on the diagram do convection currents occur to drive plate movement?

The next best alternative given up when making a choice is called the a. opportunity cost b. comparative advantage c. primary objective d. negative consequence select the best answer from the choices provided. a b c d

In which layer of the atmosphere are the particles so far apart that they can travel hundreds of kilometers without colliding with each other? a.exosphere b.troposphere c.mesosphere d.thermosphere