About what share of Earth's surface is covered by water?
AnswerAbout 71%
Oceans and other water cover roughly 71% of the surface.
Science · Facts & stats
Earth facts & stats
7 fact-checked facts about planet earth, geology and earth science, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What is Earth's largest ocean?
AnswerPacific
The Pacific covers more area than all land combined.
Going deeper
About how old is Earth?
AnswerAbout 4.5 billion years
Radiometric dating puts Earth's age at about 4.54 billion years.
What is Earth's thin, rocky outermost layer called?
AnswerCrust
The crust is the thin shell we live on.
What was the name of the supercontinent that later broke apart?
AnswerPangaea
Pangaea began breaking up about 200 million years ago.
Expert level
What is the average distance from Earth to the Sun?
AnswerAbout 150 million km
That distance, about 150 million km, defines one astronomical unit.
What is the name of the deepest known point in Earth's oceans?
AnswerChallenger Deep
Challenger Deep, in the Mariana Trench, is nearly 11 km down.
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