Most lakes were formed from
a. melting glaciers
b. shrinking oceans
c. volcanic eruptions
d. excessive precipitation

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

Which of the following best describes the purpose of a nation’s boundaries? a. to limit the movement of goods and people b. to make it easier for cartographers to create maps c. to make the movement of goods and people easier d. to prevent other countries from invading territory

All of the following are extrusive landforms except           a. batholiths.   b. lava plateaus.   c. shield volcanoes.   d. geysers.