A change in direction of a body wave when it crosses a boundary between layers with different physical properties is called seismic

A) absorption.
B) reflection.
C) refraction.
D) velocity.


Answer: C

Environmental & Atmospheric Sciences

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A) North America. B) South America. C) Europe. D) Asia. E) Africa.

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Under certain circumstances, natural selection can lead to an entirely new species, a process called ____.

A. genetic drift B. genetic isolation C. diversification D. speciation E. mutation

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Hinduism's caste system

A) assigns everyone to a distinct class. B) decrees the pilgrimages which should be taken. C) is a substitute for the lack of a holy book. D) identifies a family's important deities. E) is the basis for seasonal celebrations.

Environmental & Atmospheric Sciences

The last glacial advance peaked in North America about ____ years ago

a. 150 b. 3,000 c. 18,000 d. 100,000 e. 2.6 million

Environmental & Atmospheric Sciences