Answer: There are 63,471 people in the U.S. with the first name Chelsea. Statistically the 723rd most popular first name. More than 99.9 percent of people with the first name Chelsea are female.
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The sea served as anchient Greece's highway because it was the fastest way to get around
Answer: To date rocks geologists first give a relative age to a layer of rock at one location. Then they can give the same age to matching layers of rock at other locations. Certain fossils, called index fossils, help geologists match rock to layers.
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