Choose the correct item

1. Oceans and seas hold _________________ of all surface water.

A. 97%

B. 90%

C. 87%

2. The deepest ocean is _________________

A. Atlantic Ocean

B. Pacific Ocean

C. Indian Ocean

3. The smallest ocean is _______________

A. Pacific Ocean

B. Atlantic Ocean

C. Artic Ocean

4. Sea floor spreading describes a process that___________________

A. reconstructs the sea floor

B. destroys the sea floor

C. sinks the sea floor

5. We can state that there are ____________ stages in sea floor spreading.

A. 3

B. 4

C. 5

6. The main content of the oceanic crust is_________________

A. silica and magnesium

B. silicon and magnesium

C. silicate and magnesium

7. The oceanic crust has ____________ layers.

A. 5

B. 3

C. 4

8. The subject of plate tectonics is _____________

A. how lithospheric plates behave

B. how lithospheric plates are formed

C. how lithospheric plates move

9. Plate activities produce the following kinds of plate margins:

A. destructive, lithospheric, constructive

B. constructive, destructive, conservative

C. conservative, destructive, convective

10. Full-blown continents were formed by___________

A. accretion

B. subduction

C. separation

11. Pangea was formed as a result of ____________

A. subduction

B. converging

C. coalescing

12. Orogenesis is______________

A. mountain building

B. mountain collision

C. mountain systems

13. There are ______________major mountain building processes.

A. 2

B. 4

C. 3

14. Mountain are created by _________________

A. crustal deformation and uplift

B. crustal deformation and folding

C. uplifting and faulting

15. Pangea was created about___________

A. 200 million years old

B. 250 million years old

C. 300 million years old