Multiple Choice
The top of Earthʹs atmosphere is approximately
A) 2,000 km (1,243 mi) above Earthʹs surface.
B) 3,200 km (1,988 mi) above Earthʹs surface.
C) 1,000 km (621 mi) above Earthʹs surface
D) 480 km (300 mi) above Earthʹs surface.
Correct Answer:

Verified
Correct Answer:
Verified
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