What triggered the debris avalanche that caused the destruction of Yungay, Peru?

A) rainfall
B) an earthquake
C) volcanic activity
D) snowmelt


Answer: B

Environmental & Atmospheric Sciences

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The acquired immune cells that target pathogens in infected cells are

A) B cells. B) T cells. C) antibodies. D) antigens.

Environmental & Atmospheric Sciences

If pairs of enantiomers are only counted once, how many different aldehydes have the molecular formula C5H10O?

A) 2 B) 3 C) 4 D) 5

Environmental & Atmospheric Sciences

Which tool is part of the "irons"?

a. pick head axe b. mallet c. flat-head axe d. pry bar

Environmental & Atmospheric Sciences

An area of forest that is repeatedly clear-cut and replanted in order to provide commercial wood products is called a(n)

A. old growth forest. B. tree farm. C. pulp mill. D. second growth forest. E. virgin forest.

Environmental & Atmospheric Sciences