Thermal ionization mass spectrometer used in radiometric dating. To determine the ages in years of Earth materials and the timing of geologic events such as exhumation and subduction, geologists utilize the process of radiometric decay.

What is Earths half life?

This nuclide decays to Strontium-87 (Sr87) with a half-life of 48.8 billion years. Imagine going way back in time and looking at some lava that is cooling to become a rock.

What are the four ways to understand the Earths age?

Generally speaking, scientists have developed four different methods of determining the age of the earth .How Do Scientists Measure Earth Age?Radiation Measurement.Stratigraphic Superposition.The Fossil Record.