50 free Pacific Ocean trivia questions with answers — geography quiz, new questions added Aug 2026.
The Pacific is so big that all the world's land would fit inside it with room to spare. It holds the deepest point on Earth, the loneliest point on Earth, most of the world's islands, most of its earthquakes and volcanoes, and the two busiest tropical-cyclone nurseries. This quiz starts with the easy stuff (who named it, which continents it touches) and works up to the andesite line, the Kuroshio and Humboldt currents, the seamount chains and the surprising fact that the ocean is slowly shrinking. Along the way it covers the people who crossed it: the Austronesian voyagers who reached Hawaii and New Zealand long before Europeans, Balboa and Magellan, the Manila galleons, James Cook and Thor Heyerdahl's balsa raft. It also visits Easter Island's moai, Bikini Atoll's bombs, the Great Pacific Garbage Patch, El Niño's Christmas name and Point Nemo, where spacecraft go to die. Every answer was checked against Wikipedia's articles on the Pacific and its islands, and each question shows the sentence that supports it. When you finish, try our Atlantic Ocean, Indian Ocean and Arctic Ocean quizzes, or the general ocean quiz.
30 of 50 questions with answers and explanations. Play the quiz
Q 01How does the Pacific rank among Earth's oceans?
Largest and deepest
It covers about 46% of the planet's water surface and nearly a third of its total surface.
Q 02The Pacific's area is larger than what?
All of Earth's land combined
At about 165 million square kilometres, it beats the planet's entire landmass of roughly 149 million.
Q 03Which explorer named the ocean 'Mar Pacífico', meaning peaceful sea?
Ferdinand Magellan
After the storms off Cape Horn his fleet found calm water in 1520; the ocean was often called the Sea of Magellan until the 18th century.
Q 04Which Spanish explorer crossed the Isthmus of Panama in 1513 and named the ocean the 'South Sea'?
Vasco Núñez de Balboa
He called it Mar del Sur because it lay south of the coast where he first saw it.
Q 05What is the deepest known point in the world's oceans?
Challenger Deep
It lies in the Mariana Trench at 10,928 metres; the Horizon Deep in the Tonga Trench is the deepest point in the Southern Hemisphere.
Q 06The Pacific's most remote spot, farthest from any land, is known as what?
Point Nemo
It sits about 2,688 km from the nearest land in three directions and was pinpointed by Croatian engineer Hrvoje Lukatela in 1992.
Q 07Roughly how many islands rise above the surface of the Pacific?
25,000
The ocean has more islands than any other and they fall into three main groups: Micronesia, Melanesia and Polynesia.
Q 08What informally splits the Pacific into an East Pacific and a West Pacific?
The International Date Line
The Equator separately divides it into a North and South Pacific, giving four quadrants.
Q 09Which passage connects the Pacific with the Arctic Ocean?
Bering Strait
At the other end, Drake Passage and the Strait of Magellan link the Pacific to the Atlantic.
Q 10Where does the Pacific reach its greatest east-west width, about 19,800 km?
Around 5°N, from Indonesia to Colombia
That is halfway around the world and more than five times the diameter of the Moon.
Q 11Because of plate tectonics, what is happening to the size of the Pacific?
It is shrinking
It loses about 2.5 cm a year on three sides while the Atlantic widens.
Q 12Which is the largest island in the Pacific and the world's second largest after Greenland?
New Guinea
It belongs to Melanesia, along with the Solomons, Vanuatu, Fiji and New Caledonia.
Q 13Which of these Pacific island groups lies north of the equator and west of the date line?
Micronesia
It takes in the Marianas, Carolines, Marshalls and Kiribati.
Q 21Which country annexed Easter Island in 1888?
Chile
Navy officer Policarpo Toro negotiated the deal with the Rapa Nui; the island is famous for its nearly 1,000 moai statues.
Q 22Thor Heyerdahl's 1947 Kon-Tiki raft was built from which wood?
Balsa
The crew drifted 6,900 km in 101 days from Peru before hitting a reef at Raroia in the Tuamotus.
Q 23What is the warm current that flows north past Japan called?
Kuroshio
The North Equatorial Current turns north near the Philippines to become it; on the other side of the ocean the cold Humboldt runs up South America.
Q 14The Austronesian peoples who first settled Remote Oceania originated on which island?
Taiwan
They spread with outrigger boats and crab-claw sails from about 3000 BCE, reaching as far as Madagascar in the west.
Q 15According to the migration timeline, Polynesian voyagers reached New Zealand around which year?
1200 CE
Hawaii was settled around 900 CE and Rapa Nui around 1000 CE, making New Zealand the last major landfall.
Q 16Who completed the first circumnavigation of the world in 1522 after Magellan's death?
Juan Sebastián Elcano
He brought the remains of the expedition home across the Indian Ocean and round the Cape of Good Hope.
Q 17The Manila galleons linked the Philippines with which Mexican port for 250 years?
Acapulco
The route ran from 1565 to 1815, made possible when Andrés de Urdaneta found a return path riding the Kuroshio Current.
Q 18Which Dutch explorer made the first fully documented European landing in Australia in 1606?
Willem Janszoon
Tasman followed in 1642, reaching Tasmania and New Zealand.
Q 19Which Danish-born officer led Russia's Great Northern Expedition to Alaska and the Aleutians?
Vitus Bering
The strait and sea between Siberia and Alaska carry his name.
Q 20Which map, in 1507, was the first to show the Americas separating two distinct oceans?
Waldseemüller map
Diogo Ribeiro's 1529 map was the first to show the Pacific at roughly its true size.
Q 24Roughly what share of the world's earthquakes occur within the Pacific Ring of Fire?
About 90%
The 40,000 km belt also holds around two-thirds of the world's active or dormant volcanoes.
Q 25The Pacific is the only ocean mostly bounded by what kind of tectonic feature?
Subduction zones
Only the central North American coast and the Antarctic and Australian coasts lack them nearby.
Q 26What was the ancestral Pacific called before the break-up of Pangaea?
Panthalassa
The ocean was born about 750 million years ago when Rodinia split, but its oldest surviving seafloor is only around 180 million years old.
Q 27The Hawaiian-Emperor seamount chain was formed by what process?
Hotspot volcanism
The Louisville Ridge is another long chain built the same way.
Q 28Peruvian fishermen named the El Niño warming after whom?
The Christ Child
El Niño de Navidad was most noticeable around Christmas; La Niña is its cooler counterpart.
Q 29Which two ocean basins are the world's most active for tropical cyclones?
Northwestern and eastern Pacific
Storms in the northwest are called typhoons; those forming south of Mexico are hurricanes.
Q 30Sailors call the stormy Southern Hemisphere westerlies the Roaring Forties, Furious Fifties and what?
Shrieking Sixties
The names track latitude; the winds are strongest here because of the temperature gap between the tropics and Antarctica.