Which is not an effect of metamorphic dehydration?
A) The melting temperature of silicate minerals decreases.
B) Magma formation is enhanced.
C) Crystallization occurs more quickly.
D) Water vapor fills spaces between mineral grains.
Answer: C
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Sea stacks, sea caves, and headlands are examples of differential erosion. This means that
A. they are depositional landforms. B. they are produced when rocks of different strengths are eroded at different rates. C. they are produced by the action of currents on rock. D. they are produced by wave action on rock.
Which of these shapes of equal height has the lowest center of gravity?
A. Sphere. B. Cube. C. Cone resting on its base. D. all the same
In the early 1900s, oil became a valuable global resource. In which country did the U.S. and the U.K. first drill?
A) Iraq B) Iran C) Saudi Arabia D) Turkey E) Yemen
In general, natural resources ________
A) should not be used B) belong only to those on whose property they exist C) should be used by everyone equally D) are evenly divided among all countries E) should be used efficiently and conserved