题目内容

When granite is chemically weathered, quartz __________.

A. becomes mica
B. is converted into kaolinite
C. remains virtually unchanged
D. is changed into oxides
E. none of the above

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The source of energy that drives Earth's external processes is __________.

A. tidal forces
B. wind
C. gravity
D. the Sun

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The relation between volcanic eruptions and climate cannot be established.

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Which volcano type is a very large, gently sloping mound composed mainly of basaltic lava flows?

A. caldera
B. cinder cone
C. stratovolcano
D. composite
E. shield

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Which one of the following factors is most important in determining the texture of an igneous rock?

A. the type of dissolved gases in the magma
B. the rate at which the magma cools
C. the composition of the magma
D. the type of rock surrounding the magma
E. the time of the year the rock forms

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When granite is chemically weathered, quartz __________.

A. becomes mica B. is converted into kaolinite C. remains virtually unchanged D. is changed into oxides E. none of the above

The source of energy that drives Earth's external processes is __________.

The relation between volcanic eruptions and climate cannot be established.

Which volcano type is a very large, gently sloping mound composed mainly of basaltic lava flows?

Which one of the following factors is most important in determining the texture of an igneous rock?

A. becomes mica
B. is converted into kaolinite
C. remains virtually unchanged
D. is changed into oxides
E. none of the above