A catastrophic earthquake is one with a magnitude over 9.0. It has strong effects over areas thousands of miles in diameter. Catastrophic earthquakes are recorded about once every
A) month.
B) 2 years.
C) 20 years.
D) 500 years.
C
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The emergent layer of a rain forest would be most likely to have species that
A) prefer shade. B) have a high optimal temperature. C) have large, showy flowers. D) grow horizontally rather than vertically.
This figure shows the geologic timescale. Which period listed below would be part of the Mesozoic?
A) Neogene
B) Jurassic
C) Pennsylvanian
D) Mississippian
E) Cambrian
Which of the following is NOT a problem associated with the burning of coal?
A. acid deposition B. air pollution C. transportation of coal D. carbon dioxide and global warming
The main reason why the hypothesis of continental drift was not widely accepted was
A. there was no mechanism to move continents through the oceanic crust. B. the hypothesis required that the entire Earth was once frozen. C. the hypothesis required long, narrow land bridges that did not exist. D. All of these were reasons the hypothesis was not widely accepted.