What geological material often forms at about the time of major extinctions, for reasons not understood by scientists today?
a. shocked quartz
b. flood basalts
c. ice layers
d. clay layers
e. stony-iron
ANSWER: b
Environmental & Atmospheric Sciences
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A) did not exist until the twentieth century. B) were initially intimately involved with imperialism and colonialism. C) typically do not change in influence over time. D) would not include small cities like Brussels.
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The San Andreas Fault is an example of a/an _______ plate margin. Fill in the blank(s) with the appropriate word(s)
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The annual number of Atlantic tropical storms and hurricanes
A) is completely random. B) appears to increase and decrease at different time scales. C) is steadily increasing. D) is steadily decreasing.
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A Pitot gauge is used to determine ________ pressure.
a. flow b. operating c. residual d. static
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