Conditions in oceanic trenches that are inhospitable to life include
A) lack of light, extreme heat, and high pressure.
B) lack of light, extreme cold, and toxic chemicals.
C) lack of light, extreme cold, high pressure, and scarce food.
D) lava, high pressure, and scarce food.
C
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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
Air pollution is
A. greatest in newly industrialized countries. B. not a problem in economically developed countries. C. unrelated to the amount of industrial activity in a country. D. All these statements are correct.
The two major types of sediments that may become sedimentary rocks are ____________________
and ____________________. Fill in the blank(s) with the appropriate word(s).
How do the populations of the United States and India compare today?
A) Each country has about the same density of people per square mile. B) The population density of the United States is greater than that of India. C) The population of India is the same size as the population of the United States. D) The population of India is almost four times the size of the population of the United States.