Scientists study many lines of evidence to estimate the age of the Earth, including rocks, fossils, other objects in the solar system, and the half-lives of radioactive elements.
Based on all of this information, scientists estimate the age of the Earth to be _______ years.
A4.54 billion
B454,000
C45,400
Based on all of this information, scientists estimate the age of the Earth to be _______ years.
A4.54 billion
B454,000
C45,400