The concept of basic industries originally referred to ________
A) manufacturing
B) trapping
C) mining
D) services like police and firefighters
E) banking
Answer: A
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Which oceanographic sampling device played a large role in verifying the plate tectonic theory?
a. boxcore sampler b. clamshell sampler c. piston corer d. seismic profiler e. acoustic Doppler profiler
Spiral galaxies tend to resemble a pinwheel because ________
A) the stars in the center are very old and large while the outer edges of the galaxy contain the youngest and smallest stars B) stars in the center of galaxy are moving more slowly than the ones on the outer edges. C) the barred structures form twisted pathways that distort the flow patterns D) stars in the center of the galaxy are moving faster than the ones on the outer edges E) stars are moving from the center to the edges of the galaxy
Why do most caves form in limestone rock formations?
A) Limestone is a soft rock. B) Limestone dissolves in rainwater. C) Limestone is the most common kind of rock on Earth. D) Limestone chemically reacts readily with acidified groundwater.
The diagram below shows the record of one earthquake on seismograms at three different stations in a seismic network. These three seismograms show
A. WUAZ is the closest station, followed by DUG, and then ISCO. B. WUAZ station was right at the earthquake. C. DUG station is farthest from the earthquake. D. ISCO station is closest to the earthquake. E. None of these choices are correct.