When is refraction of incoming solar radiation greatest?
A) at sunrise
B) at sunset
C) at mid-day
D) both A and B
Answer: D
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Which environmental lapse rate represents the most unstable condition in a layer of unsaturated air?
A) 3°C per 1000 m B) 6°C per 1000 m C) 9°C per 1000 m D) 11°C per 1000 m
Seismic gaps are places where scientists think that ________
A) faults are storing elastic strain B) earthquakes are unlikely to occur C) faults are storing stress D) faults are creeping smoothly
The water table is
A) located 100 feet under the ground. B) part of the mantle. C) flat like a kitchen table. D) uneven and generally follows surface contours.
What was the main requirement for the development of life on Earth?
a. Exposure to sunlight b. Absence of free oxygen c. Simple sugars d. Energization from electrical sparks