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The timeline for the history of the planet is based on radiometric dating. Radiometric dating uses the decay rate of radioactive​ isotopes to determine the age of a sample. The following list includes geological evidence for the age of the earth and life.

Sample Age
Meteorites 4.6 billion years
Zircon crystals in sedimentary rock 4.2 billion years
Moon rocks 4.5 billion years
Oldest rocks on earth 3.9 billion years
Earliest microfossils 3.5 billion years

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Which of the following is consistent with the data?


Earth is 3.9 billion years old.


Life could have existed on the moon before developing on Earth.


Prior to 3.9 billion years ago, the surface of the earth was too hot for life to form.


The first biochemical molecules forms arose 3.5 billion years ago.

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