Where does most of the sediment on the Pacific coast originate from?

a. Granite rock
b. Biological productivity
c. Basalt Rock
d. Lava


ANS: A
The particles that make up sand on the Pacific coast are dominated by quartz and feldspar. These
components are derived from granite rock. Information can be found in the section Characteristics of
U.S. Coasts

Environmental & Atmospheric Sciences

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Which of the following are packed around the HIV genome?

A) protease B) a virus-specific reverse transcriptase C) both a and b D) neither a nor b

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Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle.



A) Likely
B) Unlikely

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What will be an ideal response?

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