If a stream drops 15 meters in 15 kilometers, what is its gradient?
A) 100%
B) 1 meter per kilometer
C) 15 meters per kilometer
D) 15 kilometers per meter
E) None of these are correct.
B) 1 meter per kilometer
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Indicate whether the statement is true or false
Clouds absorb upwelling longwave radiation, and themselves radiate as a nearly perfect blackbody down to the surface. This
A) promotes warming. B) promotes cooling. C) is a strong negative feedback. D) is not a feedback mechanism.
How do geologists determine the composition of Earth's interior? Why not examine it directly?
What will be an ideal response?
Which of the following gives the correct order for the energies of portions of the electromagnetic spectrum?
A) radio > infrared > ultraviolet B) radio > ultraviolet > infrared C) ultraviolet > infrared > radio D) ultraviolet > radio > infrared