Radiometric dating
{"Image DocumentName": "TOPIC D: ABSOLUTE DATING", "Image ImageDescription": "Carbon dating uses the half-life of Carbon-14 to find the approximate age of certain objects that are 40,000 years old or younger. The ratio of normal carbon (carbon-12) to carbon-14 in the air and in all living things at any given time is nearly constant. One in possibly a trillion carbon atoms is carbon-14. Both Carbon-12 and Carbon-13 are stable, but Carbon-14 decays by very weak beta decay to nitrogen-14 with a half-life of approximately 5,730 years. After the organism dies it stops taking in new carbon.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}