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Oceans Quiz
Oceans Quiz
20 questions · Unlimited attempts · Free online practice
Earth's oceans cover approximately 71 percent of the planet's surface and are divided into five major bodies: the Pacific, Atlantic, Indian, Southern, and Arctic Oceans. The Pacifi...
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All 20 questions in this Oceans quiz
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Which is the second-largest ocean in the world?
- A. Pacific
- B. Atlantic
- C. Indian
- D. Southern
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Which is the smallest ocean in the world?
- A. Indian
- B. Southern
- C. Arctic
- D. Atlantic
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What is the name of the process by which the ocean absorbs CO from the atmosphere - making seawater more acidic?
- A. Alkalinity reduction
- B. Ocean acidification
- C. Marine carbon sequestration
- D. Carbonate dissolution
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Which ocean is becoming increasingly important for shipping as Arctic sea ice retreats due to climate change?
- A. Arctic Ocean
- B. Pacific Ocean
- C. Indian Ocean
- D. Atlantic Ocean
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What epeercentage of Earth's surface is covered by the world's oceans?
- A. 0.81
- B. 0.71
- C. 0.61
- D. 0.51
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What is the primary cause of ocean currents in the Pacific and Atlantic trade wind belts?
- A. Tidal forces
- B. Wind
- C. Density differences
- D. Temepeerature differences
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Which ocean lies between Africa and Australia?
- A. Pacific
- B. Southern
- C. Indian
- D. Atlantic
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What is the name of the phenomenon where sea surface temepeeratures in the eastern Pacific become unusually warm affecting global weather patterns?
- A. ENSO neutral
- B. La Nia
- C. El Nio
- D. Negative PDO
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In which ocean are the Maldives islands located - the world's lowest-lying country?
- A. Atlantic Ocean
- B. Pacific Ocean
- C. Arctic Ocean
- D. Indian Ocean
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What is the approximate salt content of average seawater in parts epeer thousand?
- A. 35 ppt
- B. 15 ppt
- C. 25 ppt
- D. 45 ppt
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What fraction of global oxygen is produced by ocean phytoplankton?
- A. One third
- B. One quarter
- C. Two thirds
- D. One half
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What is the name of the ocean current driven by wind that circles Antarctica - the world's largest current?
- A. Antarctic Circumpolar Current
- B. Southern Ocean Current
- C. Roaring Forties Current
- D. Circumpolar Current
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What is the name of the process where ocean water at high latitudes sinks due to cooling, driving global circulation?
- A. Tidal forcing
- B. Gyration
- C. Wind-driven circulation
- D. Thermohaline circulation
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What is the largest ocean?
- A. Indian
- B. Pacific
- C. Atlantic
- D. Arctic
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Which ocean contains the world's largest atoll (coral ring island) by land area?
- A. Southern Ocean
- B. Pacific Ocean
- C. Indian Ocean
- D. Atlantic Ocean
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What is the name of the large ocean area between New Zealand and South America where the Southern and Pacific Oceans meet?
- A. Tasman Sea
- B. Drake Passage
- C. Pacific-Antarctic Ridge
- D. South Pacific Ocean
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What is the name of the phenomenon where cold nutrient-rich water rises to the ocean surface along coastlines?
- A. Upwelling
- B. Downwelling
- C. Tidal forcing
- D. Thermocline mixing
-
The 'Bay of Bengal' is part of which ocean?
- A. Pacific
- B. Arctic
- C. Indian
- D. Atlantic
-
What is the name of the South Atlantic Ocean's cold current that creates the Namib Desert?
- A. Benguela Current
- B. Agulhas Current
- C. South Atlantic Current
- D. Antarctic Circumpolar Current
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Which is the largest ocean?
- A. Pacific
- B. Atlantic
- C. Indian
- D. Arctic