What is NOT true about geologic time?
A. can be observed in a human lifetime
B. characterized as vast periods of time
C. contextualizes operation of geologic processes
D. related to the uniformitarianism concept
E. timescale begins with the formation of Earth
A
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The Morrison Formation is exposed in the western United States and represents a nonmarine deposit with abundant dinosaur fossils. Much of the Morrison is pure mudstone, yet it is common to find highly polished pebbles and cobbles in the mud
Which of the following do you think is the best explanation of these cobbles? A) They represent meteorites that killed the dinosaurs. B) They were placed in the mud by space aliens. C) They are impossible; people must have put them there. D) They are gastroliths, a trace fossil.
The front on the left is a
A) warm front. B) cold front. C) stationary front. D) occluded front.
LEO satellites
A) have geostationary orbits. B) are farther from Earth than are GEO satellites. C) are an integral part of the GOES system. D) travel over both poles each orbit. E) are no longer used by the United States.
An example of primary productivity would be
A. a wild raspberry plant growing 30 grams of new leaf mass during a day of photosynthesis. B. a young hawk growing 10 more grams of body mass by killing and eating a young oriole. C. a young oriole growing 10 more grams of muscle during a feeding trip to a raspberry bush.