A basic tool for indirectly studying the sea floor is the ________, which measures water depth.
A. rock dredge
B. drilling ship
C. submersible
D. gravimeter
E. echo sounder
Answer: E
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Which of the following describes the amount of oxygen inhaled in a single breath at the 500 hPa level, compared to that inhaled at sea level?
A. The amount is about the same. B. The amount is about three-quarters. C. The amount is about one-quarter. D. The amount is about one-half.
Briefly explain why the temperature decreases as altitude increases in the troposphere (at the normal lapse rate).
What will be an ideal response?
The average rate of seafloor spreading in modern oceans is ________
A) 5 centimeters per year B) 8 centimeters per year C) 2 centimeters per year D) 15 centimeters per year
What type of faults tend to produce the most destructive earthquakes?
What will be an ideal response?