Comment on the accuracy and usefulness of the atmospheric calcium additions calculation that was conducted according to Gile and Grossman's dust trap experiment
A) The data and hypothesis were extremely accurate and useful.
B) It was perhaps not very accurate, but nonetheless a useful hypothesis.
C) It was not an accurate calculation, and therefore not that useful.
D) The calculations were very accurate, but not useful because the hypothesis was not clear.
Answer: B
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Some individuals are sensitive to a multitude of toxins, a condition called ____________________
Fill in the blanks with correct word
Why does graphite feel slippery to the touch?
A) Graphite is soft and easily crushes into powder. B) Graphite atoms have many free electrons. C) Graphite absorbs water from the air so the surface always feels slippery. D) The carbon atoms in graphite are spaced closely together.
Methods to contain and clean up an oil spill ____
A) ?are most efficient if begun within 24 hours of the disaster B) ?cost less today than they did 20 years ago C) ?sometimes cause more damage than the oil itself D) ?are best when the oil is dispersed by chemicals sprayed on the ocean surface
Methylmercury is an especially dangerous neurotoxin partly because it can be biologically magnified in food chains and food webs.
Answer the following statement true (T) or false (F)