How did scientists initially deduce part of the Earth's core is molten?
A. Because the Earth has a magnetic field that requires the presence of a molten core.
B. Because it is the source of molten material for active volcanoes.
C. Because certain vibrations do not pass through it.
Answer: C
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An example of natural capital degradation as a result of deforestation is
A. improved ecological services. B. increased biodiversity. C. logging. D. habitat loss for native species E. ocean acidification.
Earth's crust moves because
A. the continental crust floats on the oceanic crust. B. the mantle is below the crust. C. the mantle is very hot and flows from internal convection. D. part of the mantle is hot enough to flow as a plastic solid.
Which of the following is a condition favoring deposition of sediment?
A) An increase in water velocity B) A decrease in gradient of the stream C) An increase in turbulence of the water D) An increase in the salt content of the water E) A decrease in grain size as a clast breaks into two pieces
True or False: The focus is the point on the surface directly below the epicenter (location within Earth) of an earthquake
Indicate whether this statement is true or false.