The top of the Earth's atmosphere is approximately
A) 3,200 km (1,988 mi) above the Earth's surface.
B) 480 km (300 mi) above the Earth's surface.
C) 2,000 km (1,243 mi) above the Earth's surface.
D) 1,000 km (621 mi) above the Earth's surface.
B
You might also like to view...
True or False: A solar wind is not moving air but is fast-moving protons and electrons blasting outward from a star
Indicate whether this statement is true or false.
In this atmospheric layer, the temperature is relatively constant for the first 10 kilometers, then it increases:
A) troposphere. B) mesosphere. C) thermosphere. D) stratosphere.
Not all volcanism results in the origin of volcanoes
Indicate whether the statement is true or false
How is an amino acid transported by tRNA?
A) It is bound to the 3' end. B) It is bound to the 5' end. C) It is bound to either the 3' or the 5' end. D) It is enveloped by the tRNA.