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Question
P waves moving through the base of continents move at about ________ km/sec, but once they cross the Moho, the velocity changes to ________ km/sec.A) 8; 4
B) 2; 10
C) 6; 8
D) 3; 9
Answer
This answer is hidden. It contains 1 characters.
Related questions
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B) Paleozoic
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A) Life
B) Water
C) Rock
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A) Mesozoic
B) Precambrian
C) Paleozoic
D) Cenozoic
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What is the effective maximum range for carbon-14 dating?
A) 100,000 years
B) 70,000 years
C) 10,000 years
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What is the half-life of potassium-40?
A) 1.3 billion years
B) 704 million years
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You are an archaeologist researching artifacts left behind by Francisco Pizzaro's conquest of Peru in the 1530s. In order to confirm the authenticity of the leather artifacts, you are performing radiometric dating using an isotope pair that has a half-life of 250 years. In order for the artifacts to date back to the time of Pizzaro's conquest, approximately how much original radioactive isotope must be left in the artifacts?
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A) Quaternary geology
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A) Kaolinite
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A) 0 km
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