Why is the dump-and-cover approach used in sanitary landfills called the "cell" method?
a. because, if it is misused, you will be thrown in jail
b. because it handles chemical reactions in the fill at the cellular level
c. because it isolates waste in cell-like compartments
d. because the pattern of dumping is circular
e. because of the way the waste is attenuated
C
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Ammonia (NH4+) is a form of nitrogen that is readily accessible and useable by plants
Indicate whether the statement is true or false
Based on atomic size, which would you expect to be more soluble in water: helium, He, or nitrogen, N2?
A. Since He atoms are smaller, more of them can fit into solution, so it has a higher solubility in water. B. Although He is smaller, its outer orbital is filled and the atom will have little attraction to the water molecules. C. Nitrogen atoms are bigger and so nitrogen molecules should be more soluble in water due to greater dipole-induced dipole attractions. D. He atoms are bigger and so helium molecules should be more soluble in water due to greater dipole-induced dipole attractions.
Which one of the following organisms is MOST LIKELY to be fossilized?
a) a butterfly in your garden b) a seashell on a beach c) a slug on a leaf d) a single-celled bacteria e none of the above will ever become a fossil
Brazil's ________ was the major destination for Portuguese slave ships
A) Northeast B) West C) East D) Central region E) South