The 1700 AD tsunami generated by a large earthquake on the Cascadia subduction zone in the Pacific Northwest was dated most precisely using
A) Native American histories
B) Pacific Northwest sediments
C) Japanese tsunami records
D) early seismograms in China
C
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Before ice forms on a lake, all the water in the lake must be cooled to
A. 4°C. B. a value slightly below 0°C. C. 0°C. D. indeterminate
According to a 2015 EPA report, between 1980 and 2014, the combined emissions of the six major outdoor air pollutants decreased by ____.
A. 17 B. 23 C. 36 D. 49 E. 70
The principal source of infectious waste material in water is
A. agricultural pesticides. B. industrial waste. C. human feces. D. surface runoff.
Which of the following statements about bushmeat are correct?
a. bush meat only refers to the largest of the game species.
b. bush meat is only harvested for subsistence purposes.
c. bush meat is often harvested because it is cheaper than other sources of meat.
d. bush meat crises may be exacerbated by habitat fragmentation