Sharpen your mind for the first question! What is the largest continent on Earth?

Fantastic! đĨŗ
I'm afraid that wasn't it. đ
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What is the deepest known part of the Earth's oceans?

You're one class act!
Doh! đ¤Ŧ
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What is the world's longest river?

Nice going!
Doh! đ¤Ŧ
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What is the Earth's largest desert?

Great job!
That was incorrect.
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What is the highest mountain on Earth?

Nice going!
Uh-oh. That was incorrect. đ
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What is the Earth's largest active volcano?

Good work!
Having difficulty with this one?
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Which layer of Earth is the thinnest and made up of two types: continental and oceanic?

Right on the money!
Hmm, I don't think so. đ
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What is the Earth's core primarily composed of?

Impressive! đ
Hmm, I don't think so. đ
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What is the Earth's approximate circumference at the equator?

Was that too easy for you?
Nope, sorry. đĸ
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What percentage of the Earth's surface is covered by water?

Magnificent!
Doh! đ¤Ŧ
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What is the process of the Earth's plates shifting and moving called?

Right on the money!
That was incorrect.
-
What causes the Earth's seasons?

You're doing great!
Having difficulty with this one?
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In which layer of the Earth's atmosphere do most weather phenomena occur?

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That was incorrect.
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Which gas is the most abundant in Earth's atmosphere by volume?

Good job!
Nope, sorry. đĸ
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Which gas is responsible for the ozone layer in Earth's atmosphere?

Outstanding!
Hmm, I don't think so. đ
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What is the name of Earth's natural satellite?

Fantastic! đĨŗ
That was incorrect.
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What planet is regarded as the Earth's twin in the solar system?

That's the way!
I'm afraid that wasn't it. đ
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What is the Earth's average distance from the Sun in miles (approximately)?

Outstanding!
That was incorrect.
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In the solar system, Earth is the ___ planet from the Sun.

You get a gold star for that! đ
That was incorrect.
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What is the approximate value of the acceleration due to gravity on the surface of Earth?

Superb!
Doh! đ¤Ŧ
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In what layer of the Earth's atmosphere do meteors burn up upon entry?

Boom! Nailed it! đ
Not quite.
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Approximately how old is the Earth according to current scientific estimates?

Amazing! đ
Doh! đ¤Ŧ
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The end is approaching! What is the name of the supercontinent that existed around 335 million years ago, before breaking apart into the continents we have today?

Good job!
Nope, sorry. đĸ
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What gas was NOT present in significant amounts in Earth's early atmosphere but became abundant due to photosynthesizing organisms?

Nice job!
That was incorrect.
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Here's the final one: what geologic eon do scientists believe we are currently in?

Nice going!
That was incorrect.
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