Absolute dating rock layers hub - Relative dating - Wikipedia


The isotope used for dating an object depends on the rough time scale involved. All living things ingest or intake a form of carbon called carbon-14. Living things only intake carbon-14 - which is radioactive - while they are alive, and any living thing has a certain set percentage of carbon-14 in its body. As soon as the living thing dies, the carbon-14 in its body begins to decay. Carbon-14 decays by beta decay into nitrogen-14 (which is very common - it is the most common element in our atmosphere). We know that carbon-14 has a half-life 5,730 years. This means that in 5,730 years, half of the amount of total carbon-14 in a sample will decay into nitrogen-14.


Absolute dating rock layers hub

Absolute dating rock layers hub