AP BIOLOGY

Detailed explanation-1: -The same techniques of radiometric dating have been used on those rocks. All the data from Earth and beyond has led to the estimated age of 4.5 billion years for our planet. determining the absolute age of something, usually through isotope analysis; yields an actual number.

Detailed explanation-2: -It is widely accepted by both geologists and astronomers that Earth is roughly 4.6 billion years old. This age has been obtained from the isotopic analysis of many meteorites as well as of soil and rock samples from the Moon by such dating methods as rubidium–strontium and uranium–lead.

Detailed explanation-3: -Scientists now know the Earth is actually 4.54 billion years old, an age built on many lines of evidence from the geologic record.

Detailed explanation-4: -Modern geologists, based on extensive and detailed scientific evidence, consider the age of the Earth to be around 4.567 billion years (4.567×109 years).

Detailed explanation-5: -Radiometric dating, which relies on the predictable decay of radioactive isotopes of carbon, uranium, potassium, and other elements, provides accurate age estimates for events back to the formation of Earth more than 4.5 billion years ago.