Planet Earth doesn't have a birth certificate to record its formation, which means scientists spent hundreds of years struggling to determine the age of the planet. So, just how old is Earth? By dating the rocks in Earth's ever-changing crust, as well as the rocks in Earth's neighbors, such as the moon and visiting meteorites, scientists have calculated that Earth is 4. Related: How Big is Earth?
Age Of The Earth
How Old Is Earth? - How Scientists Determine Its Age | Space
Many chemical elements in rock exist in a number of slightly different forms, known as isotopes. By measuring the ratio of lead to uranium in a rock sample, its age can be determined. Using this technique, called radiometric dating, scientists are able to "see" back in time. Physics , How does radiometric dating affect the way earth's age is determined? Answers: 3. Answer from: johnisawesome
4.55 ± 0.05 Gyr
Question: "How does radiometric dating fit with the view of a young earth? Radiometric dating is a method that scientists use to determine the age of various specimens, mainly inorganic matter rocks, etc. How do these dating techniques work? Uranium U , for example, is an unstable radioactive isotope that decays into Lead Pb naturally over time it goes through 13 unstable intermediate stages before it finally stabilizes into Pb In this particular case, it takes 4,,, years for half of a sample of U to decay into Pb
When asked for your age, it's likely you won't slip with the exception of a recent birthday mistake. But for the sprawling sphere we call home, age is a much trickier matter. Before so-called radiometric dating, Earth's age was anybody's guess. Our planet was pegged at a youthful few thousand years old by Bible readers by counting all the "begats" since Adam as late as the end of the 19th century, with physicist Lord Kelvin providing another nascent estimate of million years.