Maritime polar air masses rarely affect the weather of Washington and Oregon
Indicate whether the statement is true or false
False
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A country with a high physiological density has
A) a lot of people. B) a lot of people for every unit of farmland. C) a lot of farmers for every unit of farmland. D) a lot of farmland. E) a lot of farmland for every farmer.
Pathogens and waterborne diseases enter drinking water supplies from ________
A) pesticides entering groundwater B) oil and chemical spills C) poorly treated wastewater or from animal wastes from feed lots D) excess nitrogen and phosphorus as agricultural runoff E) upwelling
Which of the following most accurately describes a compound?
A) A compound is two or more atoms held together by covalent bonds. B) A compound is a substance that is made of more than one element. C) A compound is a molecule that is electrically charged. D) A compound is a combination of molecules.
Which of the following is true about a molecule which contains three polar bonds each of which have the same degree of polarity?
A) The molecule will always be polar. B) The molecule will never be polar. C) The molecule will be polar if the electron distribution is tetrahedral. D) None of the above is true.