________ are characteristics found in all good aquifers.
a.) Low porosity and low permeability
b.) Low permeability and high potability
c.) High porosity and high permeability
d.) High potability and high portability
Ans: c.) High porosity and high permeability
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Which would you expect to have a higher melting point: sodium chloride, NaCl, or aluminum oxide, Al2O3?
A. The aluminum oxide has a higher melting point because it is a larger molecule and has a greater number of molecular interactions. B. The aluminum oxide has a higher melting point because of the greater charges of the ions, and hence, the greater force of attractions between them. C. NaCl has a higher melting point because it is a solid at room temperature. D. The aluminum oxide has a higher melting point because of the covalent bonds within the molecule.
Glaciers are like dirty snowballs because they
A) roll like a ball. B) are always melting. C) consist of debris embedded in ice. D) are round.
Which must be true for motion to begin to happen? What factor is important in determining if motion occurs?
What will be an ideal response?
Aldo Leopold's "Land Ethic" essay ________
A) decries pesticide misuse B) encourages actions that preserve biotic communities C) describes how most toxic landfills are located in poorer communities D) describes the history of the EPA E) describes how American Navajos suffered from the adverse effects of uranium mining