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| Read each sentence and identify the word/phrase that you believe correctly completes the statement. Then, click on the arrow to see if your answer is correct. 1. The major basins of the world ocean are the , , , and . The ocean around Antarctica is often called the . 2. The of a substance is calculated by dividing its mass by its volume. 3. The three main divisions of the earth's interior are the , the , and the crust. 4. A long chain of submarine volcanic mountains that runs through the world ocean is called the system. 5. Sea floor is created at and destroyed at . 6. In the process of a lithospheric plate descends into the . 7. A single supercontinent called began to break up into the present-day continents about years ago. 8. The two most abundant types of marine sediment are sediment, which comes from rocks, and sediment, which is produced by organisms. 9. The continental margins consist of the , the continental slope, and the . 10. Most of the deep-sea floor, or , is between and meters deep. 11. Deep-sea hot springs, or , are places at the mid-ocean ridge from which emerges. |