Origin and Age of the Earth
About 4.6 billion years old · Four hypotheses · Features and criticisms
State the age of the earth and how that age was found
Describe the steps and features of the nebular hypothesis
Tell the planetesimal, binary and tidal hypotheses apart
Say what each hypothesis fails to explain
The age of rocks and the fossils in them are studied
It came into being about 4.6 billion years ago
Planets and stars appeared only after the universe began
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