Under suitable conditions, the first combustible product in the formation of coal is
A. peat.
B. anthracite.
C. bituminous.
D. lignite.
Answer: A
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How can the energy efficiency of coal-burning power plants be doubled?
A. cogeneration B. recycling C. burning the coal more than once D. convection ovens
Which relative dating principle states that the youngest layer in a sedimentary rock sequence is on the top of the sequence and the oldest layer is at the bottom of the sequence?
a) principle of inclusion b) principle of original horizontality c) principle of cross-cutting relationship d) principle of lateral continuity e) principle of superposition
What is the Coriolis force? What are its important properties? How does it affect the movement of objects?
What will be an ideal response?
Shale differs from mudstone in that
A. shale is visibly layered and fissile; mudstone is massive and blocky B. shale has larger grains C. shale has smaller grains D. There is no difference between shale and mudstone.