Which event does not occur as snow metamorphoses into ice?
A) Grains pack more densely.
B) Grains become more pointed.
C) The ice becomes nonporous.
D) Ice molecules move past each other.
Answer: B
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Why does a potassium-argon dating time scale reset during heating?
A) Expansion of the crystal structure may permit the loosely caged argon atoms to escape. B) Reduction of the crystal structure may permit the loosely caged argon atoms to escape. C) It gets so hot that it throws off the time scale. D) This does not happen.
Conservation tillage
a. increases labor costs b. increases erosion c. increases energy consumption d. accelerates water loss from the soil e. decreases erosion
The most recent major international study of anthropogenic influence on global climate concluded
A. the current warm-up is most likely within the normal range of natural climatic fluctuations. B. temperature changes of less than 5 degrees Celsius would not produce discernable changes in climate. C. a human influence on global climate is discernable. D. that weather patterns are changing, but not climate.
Given a population of 18 men and 7 women, which of the two following scenarios is more likely?
What will be an ideal response?