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41 Oceans Quiz Questions And Answers: And We Lived Beneath Waves

We Love Quizzes January 12, 2023

The Earth is covered mostly by oceans, vast bodies of water that house unimaginable creatures. Despite this, there is very little we actually know about it. These trivia 41 Oceans Quiz Questions and Answers will teach you about the deep, dark seas.

Oceans Quiz Questions and Answers

Oceans Quiz Questions and Answers


1. About what percent of the Earth’s surface is covered in water?

A. 86%

B. 90%

C. 75%

Click to see the correct answer
Almost ¾, or 75%, of the Earth’s surface is covered in water.


2. How many oceans are there?

A. 5

B. 3

C. 7

Click to see the correct answer
The Earth has 5 oceans.


3. Which is the largest ocean?

A. Pacific Ocean

B. Atlantic Ocean

C. Indian Ocean

Click to see the correct answer
At around 165 million square kilometers (64 million square miles), the Pacific Ocean is the largest ocean by far.


4. Which is the smallest ocean?

A. Arctic Ocean

B. Indian Ocean

C. Southern Ocean

Click to see the correct answer
At around 6 million square miles, the Arctic Ocean is the smallest ocean.


5. Which ocean did the European explorers sail in to get to America?

A. Atlantic Ocean

B. Pacific Ocean

C. Indian Ocean

Click to see the correct answer
To get to America, early European explorers sailed through the Atlantic Ocean.


6. The Mid-Atlantic Ridge is…

A. a mountain range

B. a trench

C. a tectonic plate

Click to see the correct answer
The Mid-Atlantic Ridge is an underwater mountain range and is part of the longest mountain range in the world. It also separates the North and South American tectonic plates from the Eurasian and African tectonic plates.


7. How many known species are thought to live in the Earth’s oceans?

A. 230,000

B. 1,980,000

C. 500,000

Click to see the correct answer
There are around 230,000 known species living in the Earth’s oceans, but because most of it is unexplored, the total number could be much higher.


8. What is the total combined volume of all of Earth’s oceans?

A. 1,330,000,000 cubic kilometers

B. 5,000,000 cubic kilometers

C. 280,000,000 cubic kilometers

Click to see the correct answer
The Earth’s oceans house a total amount of 1,330,000,000 cubic kilometers (320,000,000 cubic miles) of water.


9. Which two oceans are covered partly in sea ice year-round?

A. Pacific and Indian Ocean

B. Arctic and Southern Ocean

C. Indian and Atlantic Ocean

Click to see the correct answer
The Arctic and Southern Oceans are partially covered in sea ice for the whole year.

 


10. Which of these separates the Arctic Ocean from the Pacific Ocean?

A. Philippine Sea

B. Mid-Atlantic Ridge

C. Bering Strait

Click to see the correct answer
The Bering Strait, located in between Russia and Alaska, is a narrow body of water that separates the Arctic from the Pacific.


11. At which landmass do the Pacific and Atlantic ocean meet?

A. Cape Horn

B. Polynesia

C. Guam

Click to see the correct answer
The Pacific and Atlantic Ocean meet at Cape Horn, the southernmost headland of Chile.


12. The Indian Ocean is bordered by which of these countries?

A. Cuba

B. Germany

C. India

Click to see the correct answer
As suggested by its name, the Indian Ocean is bordered by India from the north.


13. What is a superocean?

A. An ocean that borders a supercontinent

B. An ocean that covers at least ⅘ of a planet

C. An extremely deep ocean

Click to see the correct answer
A superocean is an ocean that borders a supercontinent.


14. Pangea, one of Earth’s past supercontinents, was surrounded by the superocean…

A. Mirovia

B. Panthalassa

C. Atlanta-Pacifica Ocean

Click to see the correct answer
Pangea, a supercontinent that existed during the late Paleozoic era and early Mesozoic era, was surrounded by the superocean Panthalassa.


15. Which is the deepest ocean?

A. Atlantic Ocean

B. Pacific Ocean

C. Indian Ocean

Click to see the correct answer
The Pacific Ocean is not only the largest of the five, it’s also the deepest.


16. The deepest natural oceanic trench in the world is…

A. Mariana Trench

B. Tonga Trench

C. Philippine Trench

Click to see the correct answer
The deepest natural oceanic trench in the world is the Mariana Trench, with a known depth of almost 11,000 meters.


17. At which subsystem of Earth is all of its water located?

A. Atmosphere

B. Hydrosphere

C. Lithosphere

”Click


18. Which of these was NOT an explorer who navigated the Earth’s oceans?

A. James Cook

B. Strabo

C. Louis Antoine de Bougainville

Click to see the correct answer
Although Strabo, a Greek philosopher, recorded observations on tides and the sea, he was not an explorer.


19. Why is it so difficult to explore the deepest areas of the ocean?

A. Lack of light

B. Deadly sea creatures

C. The extreme pressures

Click to see the correct answer
Getting deep into the Earth’s oceans is difficult primarily because of the pressure that pushes against anyone who tries.


20. What important chemical compound do all oceans contain?

A. Sodium chloride

B. Hydroxide

C. Hypochlorite

Click to see the correct answer
Sodium chloride, commonly referred to as salt, is an important feature of the Earth’s oceans.


21. From where do the oceans get their salt?

A. Rocks from land

B. Meteorites

C. Sea creatures

Click to see the correct answer
Oceans get their salt from rocks on land. Ocean waves and rain pound against these rocks, eroding off mineral salts. The eroded material make their way into the oceans.


22. Aside from H2O, what are some of the main chemicals and compounds found in the Earth’s oceans?

A. Silica, Asbestos, radon and arsenic

B. Lithium, anhydride, toluene, and ethylamine

C. Magnesium, sulfate, calcium, and potassium

Click to see the correct answer
Magnesium, sulfate, calcium, and potassium are commonly found in the Earth’s oceans.


23. How many oceans does the equator run through?

A. four

B. three

C. one

Click to see the correct answer
The equator runs through three oceans: the Pacific, the Atlantic, and the Indian.


24. The Amazon river flows into which ocean?

A. The Atlantic

B. The Pacific

C. The Southern

Click to see the correct answer
The Amazon river flows into the Atlantic river.


25. Which early European explorer helped prove the existence of the Southern Ocean?

A. Ferdinand Magellan

B. James Cook

C. Francis Xavier

Click to see the correct answer
James Cook, from his late-1770s voyages, proved that waters covered the southern latitudes of the globe, paving the way for the existence of the Southern Ocean.


26. Which property of water does salt NOT change?

A. Salinity

B. State of matter

C. Temperature

Click to see the correct answer
Water stays a liquid, even with the presence of salt.


27. Which ocean is Hawaii in?

A. The Pacific

B. The Atlantic

C. The Indian

Click to see the correct answer
The Hawaiian islands can be found in the Pacific Ocean.


28. Which ocean is to the west of the United Kingdom?

A. The Pacific

B. The Atlantic

C. The Indian

Click to see the correct answer
The Atlantic Ocean is the ocean to the east of the United Kingdom.


29. About how many islands can be found in the Pacific Ocean?

A. 500

B. 300,000

C. 25,000

Click to see the correct answer
There are around 25,000 islands lying in the Pacific Ocean.


30. What are the three categories of marine life?

A. Plankton, nektons, and benthos

B. Quarks, scire, and angiosperms

C. Hyphae, lipids, and prophase

Click to see the correct answer
Marine life is commonly divided into three categories: plankton, nekton, and benthos.


31. What are plankton?

A. Organisms that float on water

B. Organisms that actively swim in water

C. Organisms that live on the seafloor

Click to see the correct answer
Plankton are small organisms that float on water. Examples of plankton are phytoplankton and diatoms.


32. What are nektons?

A. Organisms that float on water

B. Organisms that actively swim in water

C. Organisms that live on the seafloor

Click to see the correct answer
Nektons are organisms that actively swim in water. Examples of nektons are fish and sharks.


33. What are benthos?

A. Organisms that float on water

B. Organisms that actively swim in water

C. Organisms that live on the seafloor

Click to see the correct answer
Benthos, also known as bottom-dwellers, live on the seafloor. Examples of benthos are crabs and starfish.


34. Which of these is true about the Earth’s lakes and rivers?

A. Most lakes and rivers are saltwater

B. Lakes and rivers are safe from pollution because of their chemical composition

C. There can be lakes and rivers underneath the oceans

Click to see the correct answer
When salt water and hydrogen sulphide combine, the product becomes denser than the water surrounding it. As a result, it sinks. Lakes and rivers can then form underneath seas and oceans.


35. What is the interconnected system of Earth’s oceanic waters called?

A. Earth’s Ocean

B. Global Ocean

C. Oceanus

Click to see the correct answer
The Global Ocean, also known as the World Ocean, is the system that connects all of Earth’s oceans into one. This comprises most of the hydrosphere.


36. Which of these countries have coastlines on BOTH the Atlantic and Pacific oceans?

A. Peru

B. Brazil

C. Nicaragua

Click to see the correct answer
Nicaragua


37. How does the average depth of the oceans compare to the average elevation of the continents?

A. Oceans are, on average, deeper

B. Continents are, on average, higher

C. About the same

Click to see the correct answer
Oceans are deeper, on average


38. Maldives is a country located in which ocean?

A. Indian Ocean

B. Pacific Ocean

C. Atlantic Ocean

Click to see the correct answer
Answer: A. Indian Ocean

39. Which is the largest ocean basin by area and volume?

A. Atlantic

B. Arctic

C. Pacific

Click to see the correct answer
Answer: C. Pacific

40. What is the current record for the highest ocean wake?

A. 10.5 metres

B. 20.5 metres

C. 30.5 metres

Click to see the correct answer
Answer: C. 30.5 metres

41. Which of the following is not an island country in Pacific Ocean?

A. Vanuatu

B. Madagascar

C. Palau

Click to see the correct answer
Answer: B. Madagascar

Did you enjoy taking these trivia 37 Oceans Quiz Questions and Answers? If you’re ready for another one, click here or have a look at this famous landmarks trivia quiz.

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9 Comments

  1. nicole zanderzuk

    very informative

  2. Rowley Jefferson

    Good

  3. Lindell Gore

    i learned a lot

  4. Lindell Gore

    there were many of these answers i did not know and was very fascinated to find out

  5. helen reardigan malone

    Enjoyed quiz but would have liked my results.

  6. Barbara

    I liked.

  7. Dorian

    It was very informative, and to make it even better, there are errors in the following questions that could be addressed:
    17,21,24,31
    some are minor spelling, and one that does not allow the answer to be displayed

  8. Jacqueline

    I’ve suprised myself , as I was able to answer most of these questions.

  9. Aludra

    For me when I click the answer it doesn’t work. 😗

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