Because heat and pressure affect the ratio of radioactive parent to stable daughter, _________
rocks generally are difficult to date accurately by radiometric dating.
a. igneous
b. sedimentary
c. metamorphic
C
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Which of the following did not form in the hotter inner part of the solar system according to solar system theory?
A) water vapor B) silicates C) oxides D) metal dust
If the continents were once joined together, rocks and mountain ranges on the margins of each should have ____.
a. formed under the same conditions b. formed the same sequences c. formed at the same time d. the same structural trends and forces e. all of these
Mercury is not readily excreted but rather is stored in animal body tissues. This is an example of ________
A) biomagnification B) bioaccumulation C) toxification D) distillation
The fall of the Roman Empire in the fifth century A.D. brought about what change in urban settlements?
A) development of city-states B) rapid urbanization C) reduction in urban population D) revival of urban life E) increased trade