Earthquakes at Mount St. Helens prior to the major eruption in 1980 were caused by
A. magma rising in the volcano.
B. landslides.
C. tectonic plate movement.
Answer: A
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Winds off the Atlantic and Pacific coasts and the shores of the Great Lakes could generate enough electricity to replace all the United States' ____.
A. solar energy B. hydroelectric power C. coal-burning power plants D. nuclear power plants E. geothermal plants
Which of the following is not true?
A) The body can convert protein to fat. B) The body can store proteins. C) Protein must be consumed on a regular basis. D) None, these are all true.
The cloud with the greatest vertical growth is
a. cumulus congestus. b. cumulus humilis. c. cumulonimbus. d. cirrocumulus. e. altocumulus.
Assume that the irrigation well in the middle of this image was installed by a seed corn company and not by the farmers who own the local wells on either side
If irrigation were stopped immediately, would this localized lowering recover immediately? Why or why not? A) Yes. Water from other parts of the aquifer could replace what was lost. B) No. The average aquifer has a groundwater flow rate of 4 cm/day. C) Yes. The reduced pressure in the aquifer would allow the groundwater to flow faster. D) No. Now that irrigation has stopped, there is no suction necessary to draw the water.