In frost wedging, the principal force is exerted against the ____ of the confining rock.

a - bottom
b - outside
c - walls
d - microscopic openings
e - top


c - walls

Environmental & Atmospheric Sciences

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The vast mountain ranges on the continents form mostly at ____________________ plate boundaries

Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences

One of the major environmental hazards of heap leach mining is the use of cyanide for gold extraction

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Which of the following about U.S. pollution levels is true?

A) The release of toxic chemicals has increased by 19%. B) The average levels of lead in the blood of children have declined by 90%. C) Acid deposition has increased by 27%. D) Total emissions of five principal air pollutants have increased by 14%.

Environmental & Atmospheric Sciences

Ocean basins with continental margins are representative of the ________ stage of the Wilson Cycle

A) declining B) juvenile C) mature D) suturing E) terminal

Environmental & Atmospheric Sciences