What is the name of a vesicular, glassy-textured igneous rock formed from a viscous lava?

A. Volcanic breccia
B. Scoria
C. Obsidian
D. Pumice
E. Tuff


Answer: D

Environmental & Atmospheric Sciences

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The primary worldwide benefit of the Green Revolution has been an increase in

A) food production. B) environmental benefits. C) land reform. D) wages for farmers. E) conflicts between the primary and secondary sectors.

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Industrialization in the United States first grew rapidly when transportation came to be based on the

A. canal B. railroad C. truck D. airplane

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Nationalism is an important example of a centrifugal force, which is an attitude that tends to unify people and enhance support for a state

Indicate whether the statement is true or false.

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The Cs climates are only found near the Mediterranean Sea

Indicate whether the statement is true or false

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