Wikipedia absolute dating
This lesson introduces absolute dating and a few ways in which scientists accomplish it.The majority of the lesson focuses on radiometric dating, including an activity where students date their own "rocks and fossils".It is publicly important for the prediction and understanding of natural hazards, the remediation of environmental problems, and for providing insights into past climate change.Geology plays a role in geotechnical engineering and is a major academic discipline.
The term "geisha" is made of two Japanese words, (gei) meaning "art" and 者 (sha) meaning "person who does".
Mountains, erosion, and variations in climate were considered to be punishment for the sins committed by humanity.
Buffon's Iron Sphere Experiments- On the basis of iron sphere cooling experiments, Frenchman Georges de Buffon estimated that the Earth would have needed 75,000 years to cool to its present temperature.
A particular isotope of a particular element is called a nuclide. That is, at some point in time, an atom of such a nuclide will spontaneously change into a different nuclide by radioactive decay.
The decay may happen by emission of particles (usually electrons (beta decay), positrons or alpha particles) or by spontaneous nuclear fission, and electron capture.