The Exclusive Economic Zone of the United States comprises some of each of the following resources except
A. aluminum ore.
B. oil and natural gas.
C. cobalt and manganese crust on volcanic rocks.
D. metal-rich sulfides.
Answer: A
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Why are rocks rich in magnesium and iron called mafic?
A) Mafic is the opposite of felsic. B) Ferric is the same as mafic, which means rich in magnesium and iron. C) Mafic comes from magnesium and ferric. D) Mafic is the Latin word that means rich is magnesium and iron.
During an earthquake, solid rock produces more shaking and building damage than loose, water-saturated soils
a. True b. False
A slope is ________ if its strength exceed denundation processes and ________ if its materials are weaker than denunadation processes
A) stable; unstable B) unstable; stable C) in equilibrium; in disequilibrium D) in disequilibrium; in equilibrium
A division on the geologic time scale represents ____
a. the passage of 500,000 years. b. the passage of 250 million years c. an increase in reptilian poopulation by 100,000 d. an increase in population of all living organisms by one million e. a distinctive event in the rock record