We can use X-rays to determine the internal structure of a mineral, and thereby ________.
A. change the mineral's structure.
B. shrink the mineral.
C. destroy the mineral.
D. identify the mineral.
E. change the mineral's composition.
Answer: D
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Which of the following is true about how weathering affects fractured rocks?
A) Weathering affects rocks from the outside in, forming an outer weathered zone or rind. B) Weathering attacks corners from three sides and so these are preferentially removed. C) Preferential weathering along fractures can cause blocks to become rounded. D) All of these are correct.
Which one of the following statements is true for an artesian aquifer?
A) Upward flow from a permeable aquitard is prevented by a confining aquifer. B) In deep, stream-cut valleys, many springs are fed from artesian aquifers. C) The pressure at any point in the aquifer is considerably less than the weight of the water column between the point and the top of the aquifer. D) The water table in the recharge area is at a higher elevation than the top of the aquifer in the subsurface.
An atom of sodium (Na) has a single electron in its outer shell and an atom of chlorine (Cl) has seven (7 ) electrons in its outer shell. What happens when these two elements bond?
A)Sodium becomes negatively charged. B)The compound becomes poisonous. C)Sodium shares its electron with chlorine. D)Chlorine becomes positively charged. E)There is a transfer of one electron from sodium to chlorine.
At 10° north, the sun angle will reach 90° at some time during the year
Indicate whether the statement is true or false