1.) explain the theories of continental drift, seafloor spreading, and plate tectonics.
2.) describe three types of plate boundaries and identify the land formations that result from these movements.

The covers all of earth like a thin shell,but it is not a solid sheet of material.it is broken up into several large sections and many smaller ones. fill in the blank.

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

Which statement about this figure is false