Oil shales are ____
A)found only in North and South America
B)useful for the kerogen that can be extracted
C)less expensive to process than are conventional oil sources
D)currently producing 15 percent of the United States' oil
E)currently producing 30 percent of the United States' oil
B
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As with an inclined plane, a hydraulic press can increase energy.
A. Sometimes true. B. Always true. C. Always false. D. Sometimes false.
Earth's core is probably:a
composed of rock with high silica content. b. hollow. c. molten throughout. d. composed of potassium and aluminum rich silicates. e. composed mostly of iron and nickel.
A Roche Moutonnée is a symmetric bedrock hill shaped by the flow of glacier ice.
a. true b. false
The Earth's coastlines are among the oldest geomorphological structures on the planet
Indicate whether the statement is true or false