________ eruptions are the most violent types of explosive eruptions.
A. Hawaiian-type
B. Vulcanian-type
C. Icelandic-type
D. Pompeiian-type
E. Plinian-type
Answer: E
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If sediment is from natural sources, why is it considered a water pollutant?
A) it is an out-of-place resource B) it is toxic at its source, so it is also toxic in the water C) it is usually laden with mercury D) it is only a pollutant if it contains agricultural chemicals
The Food Quality Protection Act replaced the Delaney clause in 1996. This changed the standard from banning pesticide residues on food that present
A) any risk of cancer to a reasonable certainty of no harm. B) a reasonable certainty of no harm to any risk of cancer. C) a high risk of cancer to a slight risk of cancer. D) some risk of cancer to no chance of cancer.
Nuclear fission is the process of
A) bringing light atoms together to make heavier atoms B) splitting of heavy atoms to make light atoms C) using solar energy to excite atomic nuclei D) producing nuclear fuel
Wintertime anticyclones in the United States usually originate as mT air masses
Indicate whether the statement is true or false