Chapter16: Evidence Of Evolution
Section: Chapter Questions
Problem 7SA: If the half-life of a radioisotope is 20,000 years, then a sample in which three-quarters of that...
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Question
Radiometric dating is a technique used to determine the age of rocks. Geologists have used this technique to determine that:
A. |
The universe started with the "Big Bang." |
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B. |
Earth is about 6.2 trillion years old, and life appeared on Earth about 4.9 trillion years ago. |
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C. |
Earth is about 4.6 billion years old, and life appeared on Earth about 4.1 billion years ago. |
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D. |
Earth is about 4.6 million years old, and life appeared on Earth about 4.4 million years ago. |
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E. |
Earth is about 6.2 thousand years old, and life appeared on Earth about 6 thousand years ago. |
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