While the Native Americans fell victim to European diseases, including smallpox, influenza, measles, and typhus, Europeans contracted syphilis from the Native Americans

Indicate whether the statement is true or false.


Answer: TRUE

Environmental & Atmospheric Sciences

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A silica tetrahedron is composed of:

a. one silicon atom and three oxygen atoms b. one silicon atom and four oxygen atoms c. one silicon atom and three hydroxide molecules d. one silicon atom; three oxygen atoms; and one or more cations, depending on their charge

Environmental & Atmospheric Sciences

Which type of radiation is being emitted in the following incomplete nuclear equation: Po ? Pb +?

A) alpha
B) beta
C) gamma
D) A and B
E) none of the above

Environmental & Atmospheric Sciences

Sedimentary rocks are more a product of the ________ system whereas metamorphic and igneous rocks are more a product of the ________ system

A) tectonic; rock B) endogenic; exogenic C) intrusive; extrusive D) exogenic; endogenic

Environmental & Atmospheric Sciences

Since the 1960s, as a result of automobile modifications (as well as other factors), carbon monoxide emissions in the U.S. have declined by more than three-fourths and ________ emissions by more than 95 percent

A) nitrogen oxide and hydrocarbon B) nitrogen hydroxide and oxygen C) nitrogen and oxygenated D) sulfur dioxide and bicarbonate E) hydrocarbon and sulfur dioxide

Environmental & Atmospheric Sciences