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Which radioactive isotope has a half-life most useful for dating an object about 4500 years old?

The half life of a radioactive material can

The most important tool in your test taking arsenal is your

In rock layers which have not been disturbed, which is typically the oldest layer?

In order to date a rock sample 4 billion years old a scientist would most likely use this radioactive isotope

Which characteristic is most useful in correlating Devonian-age sedimentary bedrock in New York State with Devonian-age sedimentary bedrock in other parts of the world?

Based on the theory of plate tectonics, it is inferred that over the past 250 million years North America has moved toward the

An intrusion into a rock layer is