What is an index fossil?
A) An organism that existed for a vast period of time and is representative of an era
B) An organisms that is restricted to one small, geographic setting
C) A trace fossil that defines a colony of organisms
D) An organism that was geographically widespread but limited to a short span of geologic time
Answer: D
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Glaciers
A) grow when ice and snow accumulation exceeds melting. B) can, in some instances, move several meters per day. C) can trap bubbles of atmospheric gases. D) all of the above E) none of the above
We know from the second law of thermodynamics that some of the high-quality energy in each step of processing is
A. wasted and degraded to lower-quality energy. B. upgraded to higher-efficiency energy. C. maintained at the same level of quality. D. destroyed completely. E. converted into renewable energy.
The pattern by which communicable diseases (including HIV/AIDS) spread is usually by a combination of expansion and hierarchical diffusion
Indicate whether this statement is true or false.
Which of the following hurricane strengths is indicated by Category 5 on the Saffir-Simpson scale?
A. a very weak hurricane B. a very strong hurricane C. a weak hurricane D. a moderately strong hurricane