题目内容

In the field, when you tried to identify the hardness of an unknown mineral, you found that it scratches your fingernail, but not the copper coin. In fact, the copper coin scratres the mineral. Then what would be the range in hardeness for this mineral?

A. greater than 3 but less than 7
B. greater than 1 but less than 3
C. greater than 5
D. greater than 5 but less than 7
E. greater than 3 but less than 5
F. less than 1

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Which of the following is not true about the two minerals graphite and diamond?

A. same chemistry but different crystal structures
B. diamond is “harder”
C. same crystal structure but different chemistry
D. both are composed of carbon atoms

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The best approximation of the true outer boundary of the continents is the seaward edge of the ____________.

A. abyssal plain
B. continental shelf
C. mid-ocean ridge
D. present-day shorelines
E. deep-ocean trench

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The age of the deepest sediment in an ocean basin ____________ with increasing distance from the oceanic ridge.

A. increases
B. remains the same
C. decreases
D. varies

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The principle of uniformitarianism indicates that ______.

A. the past is the "key" to the future
B. tomorrow is the "key" to the past
C. the present is the "key" to the past
D. the past is the "key" to the present

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In the field, when you tried to identify the hardness of an unknown mineral, you found that it scratches your fingernail, but not the copper coin. In fact, the copper coin scratres the mineral. Then what would be the range in hardeness for this mineral?

A. greater than 3 but less than 7 B. greater than 1 but less than 3 C. greater than 5 D. greater than 5 but less than 7 E. greater than 3 but less than 5 F. less than 1

Which of the following is not true about the two minerals graphite and diamond?

The best approximation of the true outer boundary of the continents is the seaward edge of the ____________.

The age of the deepest sediment in an ocean basin ____________ with increasing distance from the oceanic ridge.

The principle of uniformitarianism indicates that ______.

A. greater than 3 but less than 7
B. greater than 1 but less than 3
C. greater than 5
D. greater than 5 but less than 7
E. greater than 3 but less than 5
F. less than 1