This is the boundary for most of the atmosphere's weather
A) tropopause.
B) mesopause.
C) stratopause.
D) the outer edge of the thermosphere.
E) an elevation of approximately 25,000 feet.
A
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Which type of earthquake wave most closely resembles sound waves?
a. P-waves b. S-waves c. Love waves d. Rayleigh waves e. permanent waves
Entrenchment of a channel occurs because
A) a decrease in stream gradient occurs. B) a change in the bed load size-distribution occurs. C) the river flows from consolidated rock into a region composed of loose sediments. D) rejuvenation occurs due to uplift. E) isostatic downwarping of the crust occurs.
Each day past the winter solstice the noon Sun is a little higher above the southern horizon
a. True b. False
What is a main hazard of this type of volcano?
A. hot fragments thrown a short distance from the volcano B. destruction by moderately fluid lava flows that can flow far from the volcano C. volcanic mudflows and landslides D. burning, building collapse, and suffocation from an eruption column and pyroclastic flows