Which of the following describes the most common snow condition that produces a creaking sound when someone is walking on snow?
A. old snow when the air temperature is above -10°C
B. old snow when the air temperature is near freezing
C. new snow when the air temperature is below -10°C
D. new snow when the air temperature is near freezing
Answer: C
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Fractures along which the rock has slipped relative to the other side are called
A) faults. B) cracks. C) joints. D) beds.
Shoot a cannonball horizontally from a cannon at a mountain top and it crashes to Earth when fired at a speed of
A. 5 km/s. B. 9 km/s. C. 8 km/s. D. all of the above
Oil production in the U.S. has increased due to the use of hydraulic fracturing of shale rocks.
Answer the following statement true (T) or false (F)
Hurricane Katrina flooded 80 percent of which city?
A) New York City B) Miami C) Galveston D) New Orleans E) Honolulu