How much of the world's crude oil is found on the seafloor?
a. 25%
b. 35%
c. 45%
d. 55%
ANS: B
The ocean makes a large contribution to the world's need for petroleum and natural gas.
Approximately 35% of the world's crude oil came from the seafloor. Natural gas from the seabed
contributes about 28% of the world's usage. Information can be found in the section Physical
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Which of the following statements best describes the effect of heteroatoms on hydrocarbons?
A. Heteroatoms have very similar properties to hydrocarbons. B. Heteroatoms greatly alter the chemical and physical properties of a hydrocarbon. C. Heteroatoms have little effect on the chemical and physical properties of a hydrocarbon. D. The properties of the heteroatom compounds depend only on the atom, not how it is bonded to the hydrocarbon. E. none of the above
Which of the following rocks is composed of the smallest sedimentary clasts?
A) Breccia B) Conglomerate C) Shale D) Sandstone
Services generate more than ________ of GDP in most developed countries, compared to less than ________ in most developing countries
A) two-thirds; half B) three-quarters; two-thirds C) three quarters; half D) half; two-thirds E) two-thirds; three-quarters
If pollutants are emitted into the air and water, what costs might be incurred as a result?
A. compromised recreation possibilities B. decreased property values C. loss from destruction of wildlife habitat D. health injuries and all of the above