Identify five major features of the ocean floor?

1. Continental Margins: These are the regions where the continents meet the ocean floor. They can be divided into two main types: passive margins and active margins. Passive margins are characterized by a gentle slope and a lack of volcanic activity, while active margins are characterized by steep slopes and frequent volcanic activity.

2. Mid-Ocean Ridges: These are long, narrow mountain ranges that run through the center of the ocean basins. They are formed by the spreading of the ocean floor and are the sites of frequent volcanic activity.

3. Ocean Trenches: These are deep, narrow valleys that are found along the edges of some of the ocean basins. They are formed by the subduction of one tectonic plate beneath another and are often associated with volcanic activity and earthquakes.

4. Abyssal Plains: These are vast, flat regions that cover much of the ocean floor. They are formed by the deposition of sediments from the continents and from the ocean floor itself.

5. Seamounts: These are underwater mountains that rise from the ocean floor but do not reach the surface. They are formed by volcanic activity and can be found in all ocean basins.