16. What is the name of the underwater mountain range that runs down the center of the Atlantic Ocean, dividing it into two large basins?
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17. Which ocean is located primarily in the northern hemisphere and is covered with ice for much of the year?
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18. The Great Barrier Reef, the world's largest coral reef system, is found in the Coral Sea, which is part of which ocean?
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19. Which of the following is the deepest point in the Indian Ocean?
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20. Which ocean is the second largest and is characterized by its S-shaped basin?
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21. The Antarctic Circumpolar Current, the largest ocean current in the world, is found in which ocean?
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22. Which ocean is known for its monsoon-driven currents that reverse direction seasonally?
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23. The Strait of Gibraltar connects the Atlantic Ocean to which sea?
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24. Which of these is the largest gulf in the world?
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25. The Sargasso Sea, known for its abundance of seaweed, is located within which ocean?
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26. The archipelago of the Philippines is located in which ocean?
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27. Which strait separates Asia from North America?
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28. The Great Barrier Reef, the world's largest coral reef system, is located off the coast of which country?
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29. Which of these is a major sea known for being almost entirely landlocked?
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30. The Mariana Trench, the deepest known point in Earth's oceans, is located in which ocean?
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Showing 16 to 30 of 42 questions