The chronicle of this great change can be broken into five periods; ran from AD 1600-1700.

In this period a number of comprehensive cosmogonies were proposed.

how to date a fossil using radiometric dating-71

The half-life of a radioactive isotope describes the amount of time that it takes half of the isotope in a sample to decay.

In the case of radiocarbon dating, the half-life of carbon 14 is 5,730 years.

In short, Genesis was an allegory and not literal history.

The story of this great change in the conception of the history of Earth is not a simple one.

However, the principle of carbon-14 dating applies to other isotopes as well.

Potassium-40 is another radioactive element naturally found in your body and has a half-life of 1.3 billion years.

Experts can compare the ratio of carbon 12 to carbon 14 in dead material to the ratio when the organism was alive to estimate the date of its death.

Radiocarbon dating can be used on samples of bone, cloth, wood and plant fibers.

This is an informational tour in which students gain a basic understanding of geologic time, the evidence for events in Earth’s history, relative and absolute dating techniques, and the significance of the Geologic Time Scale.

acquired trait: A phenotypic characteristic, acquired during growth and development, that is not genetically based and therefore cannot be passed on to the next generation (for example, the large muscles of a weightlifter).

adaptation: Any heritable characteristic of an organism that improves its ability to survive and reproduce in its environment.