Approximately how long ago did Earth form?

1 Answer
tcw1
Aug 1, 2017

4.543 billion years

Explanation:

Using radiometric dating, scientists have found that the oldest rocks on Earth are about 4.3 billion years old. However, rock is constantly being recycled due to plate tectonics. Rocks on the moon are not, though. Moon rocks have been found to be between 4.4 and 4.5 billion years old, confirming the age of the Earth.

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