1. A. Continental Shelf
A gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent.

2. B. Continental Slope
A steep incline at the edge of the continetal shelf, marking where continental rock ends & where oceanic rock begins.

3. Continental Shelf

4. Continental Shelf

5. Continental Shelf

6. Smooth, nearly flat region of the ocean floor.
C. Abyssal Plains
Smooth, nearly flat region of the ocean floor.

7. Continental Shelf

8. Continental Shelf

9. A continuous range of mountains that winds all around the Earth.
D. Mid-Ocean Ridge
A continuous range of mountains that winds all around the Earth.

10. Continental Shelf

11. Continental Shelf

12. Mountains that are completely underwater.
E. Seamount
Mountains that are completely underwater.

13. Steep-sided canyon in the ocean floor.
F. Deep-Ocean Trench
Steep-sided canyon in the ocean floor.

14. G. Volcanic Island
Underwater mountains that are tall enough to break the ocean’s surface, forming islands.

15. 1. What factors make the ocean floor research difficult?
Ocean Topography
1. What factors make the ocean floor research difficult?
Extreme pressure
Cold temperatures
darkness