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OpenStudy (anonymous):
How old is Planet Earth? Cite 2 or 3 pieces of scientific evidence to support your answer.
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OpenStudy (girlgoyleh.):
4.54 million years old (approximately)
OpenStudy (girlgoyleh.):
they found this out by using radiometric dating and radiocarbon dating
OpenStudy (girlgoyleh.):
this was really interesting: http://www.scientificamerican.com/article/how-science-figured-out-the-age-of-the-earth/
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