The area at the surface directly above the subsurface location where seismic waves are initiated is termed the
A) epicenter.
B) fault area.
C) Richter zone.
D) focus, or hypocenter.
A
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A) 95 B) 20 C) 53 D) 83 E) 10
Which era is sometimes called the "age of dinosaurs"?
A) Mesozoic B) Cenozoic C) Pleistocene D) Cretaceous E) none of these
If you were floating in the middle of the ocean and a wave passed by, your motion would be ________
A) in the direction of the wave B) in the direction opposite to that of the wave C) up and down D) first in the direction of the wave and then in the direction opposite to that of the wave E) at right angles to the wave motion
Thermal pollution differs from most chemical pollution in that
A. it is localized in impact and short-lived. B. despite being called "pollution", it causes no real harm. C. it has by now effectively been eliminated as an environmental hazard. D. All of the choices are correct.