The Earth is estimated to be approximately __________ years old.
A) 65 million
B) 4.5 billion
C) 45 million
D) 6.5 billion

Name: The Earth is estimated to be approximately __________ years old. A) 65 million B) 4.5 billion C) 45 million D) 6.5 billion
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Question

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The calculated age of the Earth is about 4.54 billion years, based on radiometric dating of the oldest known rocks, and the moon rocks brought back by the Apollo missions.

The Earth Is Estimated to Be Approximately __________ Years Old