Why is radiometric dating important Online chat with aunty
The easiest form of radioactive dating to understand is Carbon 14.
Carbon 14 with a half life of 5,700 years can only be used to date the most recent fossils. A fossil of 57,000 years would have = # 1/1024 = .000098 = .0098% It would require great precision to measure such a small amount of radioactive carbon.
All rocks and minerals contain long-lived radioactive elements that were incorporated into Earth when the Solar System formed.
These radioactive elements constitute independent clocks that allow geologists to determine the age of the rocks in which they occur.
Radioactive dating can provide supporting evidence for evolution.
This decay is an example of an exponential decay, shown in the figure below.
Knowing about half-lives is important because it enables you to determine when a sample of radioactive material is safe to handle.
In 1905, shortly after the discovery of radioactivity, the American chemist Bertram Boltwood suggested that lead is one of the disintegration products of uranium, in which case the older a uranium-bearing mineral the greater should be its proportional part of lead.
Analyzing specimens whose relative geologic ages were known, Boltwood found that the ratio of lead to uranium did indeed increase...