A(n) ________ is a seismic sea wave.
A. S-wave
B. R-wave
C. body wave
D. tsunami
E. tidal wave
Answer: D
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Warm, dry air rises and hot, wet air sinks
Indicate whether the statement is true or false
The newly-formed Earth’s atmosphere was very different from Earth’s current atmosphere
because it had a. virtually no nitrogen, the major component of today’s atmosphere. b. an enormous amount of carbon dioxide, resulting in very hot temperatures due to greenhouse effect. c. virtually no oxygen, a necessary component for the existence of animal life. d. an enormous amount of methane and ammonia, which was never lost by the atmospheres of the outer planets. e. an abundance of mercury vapor
Sonic booms are produced when an aircraft exceeds the speed of light at the altitude at which it is flying. The aircraft compresses the air, forming a shock wave that trails out as a cone behind the aircraft. Along the shock wave, the air pressure changes rapidly over a short distance. The rapid pressure change causes the distinct boom
a. True b. False
A great circle can be described as ________.
A. having its center at Earth's center and being the shortest path between two points on Earth's surface B. being the shortest path between two points on Earth's surface C. always being a straight line on an equatorial cylindrical projection D. having its center at Earth's center E. All of these are correct.