Question

According to scientific evidence, the age of the earth is about _____. 3.5 billion years old 4.6 billion years old 7.2 billion years old 2.3 billion years ol

Answer 1

4.6 billion years old.

Answer 2

Scientific experts have determined that the earth is about 4.6 billion years old. This scientific estimation was made be examining decay rates of specific radioisotopes found within fragments of a meteor within the Canyon Diablo. Specifically the radioactive decay of Uranium was compared to the relative abundances of other earth elements.