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Everyday Science NULL Medium
Question

___________ begins around 690–1,000 km altitude and extends to roughly 10,000 km.

A
Troposphere
B
Mesosphere
C
Exosphere
✓ Official correct answer
D
Stratosphere

Community credibility

Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.

A
Troposphere
Official option

No member explanations yet for this option.

B
Mesosphere
Official option

No member explanations yet for this option.

C
Exosphere
Official option

No member explanations yet for this option.

D
Stratosphere
Official option

No member explanations yet for this option.

Explanation

That outermost region is the exosphere.

So the correct answer is Exosphere.

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