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Geologist: As a spinning object's radius decreases, its rate of rotation increases; for example, figure skaters can twirl faster by bringing their arms closer to their sides. ████ ███ ██ ███████ █████ ██ ███████ ████ ████ ███ ████ ███████ ███████ ████ ██ ████████ ██████████ ███ ███████████ ████ █████████ ██ ██████ ███ ████████ ██████ ███ ████ ███████ ███ █████ ███████████ █████ ██ ██████████ ███████ ████████ ██████ ████ ██████ ███ ██████ ██ ███ ██████ █████ ████████ ██████ ███████ ██████ ██ █████████
Summarize Argument: Phenomenon-Hypothesis
A Geologist believes that Earth’s rate of rotation increased over the past decade due to a law of physics: as a spinning object’s radius decreases, its rate of rotation increases. The Geologist claims that the increase in the number and severity of earthquakes have caused the Earth’s tectonic plates to move toward the center of the Earth, causing the radius to decrease and the speed to subsequently increase.
Notable Assumptions
The author assumes that the movement of tectonic plates toward the center of the Earth outweighs any other factors that could cause the Earth’s radius to increase.
19.
Which one of the following, ██ █████ █████ ████ █████████ ███ ███████████ ███████████ ██ ███ ███████ ████ ██ ████████ █████████ ████ ███ ████ ███████
a
In the beginning ██ ███ █████████ ████████ ██████████ ████████ ██ ████████ ██ ██████ ███ ████████ ██ ████████████ ███████████ ██ █ ████████ ██ ███████ ███████
b
During the past ███████ █████ ██████████ ██████ ████ ████████████ ███ █████████ ██ ███ ████████ ██████ ████ █████ ███████████ █████ ████████████
c
Only skillful figure ███████ ███████ ██ ████████ ██████ ██ ████████ █████ ████ ██████ ██ █████ ██████
d
Since the time ██ ███ ███████ ██████████ ███████ ████ ██ ████████ ███ ████ █████ ██ ██████████
e
Increased volcanic activity ████ ███ ████ ███ █████ ████████ ████ ███ ███████ ████████ ██ ███ ████████ ██████ ███ ██████████