Which of the following is NOT a typical characteristic of a volcano?
A. conical-shaped hill
B. fresh ash layers or lava flows covering part of a conical hill
C. flat-topped mesa with eroded volcanic rock cliffs at that top
D. crater at or near the top of a hill
Answer: C
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Which of these chemicals that are emitted from a smelter not equipped with air pollution control equipment causes acid rain?
A. sulfur dioxide B. mercury C. arsenic D. cyanide
Large cloud droplets fall faster than small cloud droplets because gravity acts more strongly on larger droplets
a. True b. False
With respect to modeling Earth's climate system, which of the following best describes global circulation models (GCMs)?
A. accurately simulate the past climate and are used to project the future climate B. can accurately simulate future temperature increases, but not precipitation C. are only models, hence cannot accurately simulate something as complicated as climate D. simulations of the past climate are too uncertain, thus future projections are fairly meaningless E. have too many unknown variables to be used with any degree of certainty
A woman experiences an electrical shock. The electrons making the shock come from the
A) woman's body. B) ground. C) power plant. D) hair dryer. E) electric field in the air.