Relative dating of rock layers

Posted by / 19-Aug-2016 08:29

Relative dating of rock layers

The age of the remains of plants, animals, and other organic material can be determined by measuring the amount of carbon-14 contained in that material.

Carbon-14, a radioactive form of the element carbon, is created in the atmosphere by cosmic rays (invisible, high-energy particles that constantly bombard Earth from all directions in space).

Absolute dating methods are carried out in a laboratory.

Dendrochronology: Also known as tree-ring dating, the science concerned with determining the age of trees by examining their growth rings.

Half-life: Measurement of the time it takes for one-half of a radioactive substance to decay.

By measuring the amount of original and transformed atoms in an object, scientists can determine the age of that object.

Cosmic rays: Invisible, high-energy particles that constantly bombard Earth from all directions in space.

relative dating of rock layers-23relative dating of rock layers-89relative dating of rock layers-89

Eventually, the entire ecosystem (community of plants and animals) of the planet, including humans, is filled with a concentration of carbon-14.