After reading, studying, and discussing Chapter 12, you should be able to:

• Describe the extent of the world ocean.

• Describe the features associated with both passive and active continental margins.

• List and describe the major topographic units of the ocean basin floor.

• Discuss the general structure of mid-ocean ridges.

• Describe how each of the three broad categories of seafloor sediments originates and the association between seafloor sediments and climate change.

• List several resources obtained from the seafloor.

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