Radioactive Dating - Research Article from World of Scientific Discovery

This encyclopedia article consists of approximately 4 pages of information about Radioactive Dating.
This section contains 986 words
(approx. 4 pages at 300 words per page)
Buy the Radioactive Dating Encyclopedia Article

Radioactive Dating

Before the twentieth century, determining the age of ancient artifacts was considered the job of archaeologists, not nuclear physicists. By comparing the placement of objects with the age of the rock and silt layers in which they were found, archaeologists could usually make a general estimate as to their age. However, many objects were found in caves, frozen in ice, or in other areas whose ages were not known; in these cases, it was clear that a method for dating the actual object was necessary.

In 1907, the American chemist Bertram Boltwood proposed that rocks containing radioactive uranium could be dated by measuring the amount of lead in the sample. This was because uranium, as it underwent radioactive decay, would transmute into lead over a long span of time. Thus, the greater the amount of lead, the older the rock. Boltwood used this method, called radioactive dating...

(read more)

This section contains 986 words
(approx. 4 pages at 300 words per page)
Buy the Radioactive Dating Encyclopedia Article
Copyrights
World of Scientific Discovery
Radioactive Dating from World of Scientific Discovery. ©2005-2006 Thomson Gale, a part of the Thomson Corporation. All rights reserved.
Follow Us on Facebook