What is Earth's largest ocean?
AnswerPacific Ocean
The Pacific is the largest and deepest ocean, covering about a third of Earth's surface.
Nature · Facts & stats
Earth facts & stats
7 fact-checked facts about Earth's land, oceans and climate, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What is the largest hot desert on Earth?
AnswerSahara
The Sahara in North Africa is the largest hot desert; cold Antarctica is the largest desert overall.
Going deeper
Where is the deepest known point in Earth's oceans?
AnswerChallenger Deep in the Mariana Trench
Challenger Deep, in the western Pacific's Mariana Trench, is nearly 11 km deep.
What was the supercontinent that joined nearly all of Earth's land roughly 300 to 200 million years ago?
AnswerPangaea
Pangaea later broke apart into Laurasia in the north and Gondwana in the south.
Which gas, released by burning fossil fuels, is the main long-lived greenhouse gas warming Earth?
AnswerCarbon dioxide
Burning coal, oil and gas releases carbon dioxide, which traps heat in the atmosphere.
Expert level
Roughly what share of Earth's water is fresh water?
AnswerAbout 3%
About 97% of Earth's water is salty ocean water; only around 3% is fresh, mostly locked in ice.
What is the largest island on Earth that is not a continent?
AnswerGreenland
Greenland is the world's largest island; Australia is classed as a continent.
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