If P and S waves were to travel at the same constant speeds, what could be inferred about the Earth's
interior?
a. The interior is density stratified.
b. The interior is liquid.
c. The interior is homogenous.
d. The interior is solid
ANS: C
If the interior of Earth was homogenous, they waves would travel through it at the same speed and in a
straight line. Information can be found in the section The Study of Earthquakes Provides Evidence of
Layering.
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Carbon dioxide reacts with water to form
A. carbon dioxide and water. B. sodium bicarbonate. C. carbonic acid. D. hydrated carbon.
Which of the following terms refers to the luminous surface of the sun?
A. corona B. photosphere C. chromosphere D. thermosphere
Sedimentary environments on land differ because of variations in
a) local geology b) topography c) amount of water d) all of these choices are correct
Which of the following kinds of coal has the highest carbon content?
A. Bituminous B. Brown coal C. Sub-bituminous D. Lignite