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How have the ages of lunar rocks been determined?


A) From the weathering the rocks have experienced
B) By counting layers of sediments
C) By examination of the radioactive materials they contain
D) By measuring their magnetization

E) A) and B)
F) A) and C)

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What is the interval of time between eclipse seasons?


A) A few weeks
B) About 6 months
C) 1 day
D) About 50 years

E) All of the above
F) B) and C)

Correct Answer

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