Some scientists think that Yellowstone could cause a future disaster because
A. land near Yellowstone is uplifting in some places and subsiding in others.
B. past eruptions from Yellowstone carried ash over a huge area of western North America.
C. scientists think that magma is still present at depth.
D. the area is part of a caldera.
E. All of these choices are correct.
Answer: E
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Which of the following is true of agricultural land in North America?
A) Today, agricultural land continues to increase B) Today, agricultural land continues to decrease C) Today, growing forests are being replaced by agricultural land D) Food production continues to decrease in the last 50 years E) Most of the wheat and oats used on this continent is imported from Europe
The Western United States has been exceptionally dry over:
a. the past 100 years b. the past 50 years c. the past year d. the past 10 years
How did eukaryotic cells evolve, and why was this advance so important in life history? What will be an ideal response?
Solar radiation is considered ____ radiation
a. long wave b. unstable wave c. short wave d. stable wave