Larger-than-life concepts such as prehistoric time, half-life properties and decay functions can be wrestled down to understandable portions using lesson plans provided by educational and state agencies for free online. Engaging middle school students in hands-on activities makes learning fun, increasing retention rates and the ability to integrate radiometric dating concepts with larger scientific and mathematical concepts later on. The University of Colorado hosts an interactive Radioactive Dating Game that teaches students about carbon and other radiometric dating types, as well as half-life and decay functions. Students must match the age of items with the percentage of dating elements remaining to win the game. This game can be downloaded for play on computers in classrooms, or it can be played online.
How is radiometric dating used to determine the age of earth - Tots2Tweens
The age of Earth is estimated to be 4. Following the development of radiometric age-dating in the early 20th century, measurements of lead in uranium-rich minerals showed that some were in excess of a billion years old. It is hypothesised that the accretion of Earth began soon after the formation of the calcium-aluminium-rich inclusions and the meteorites. Because the time this accretion process took is not yet known, and predictions from different accretion models range from a few million up to about million years, the difference between the age of Earth and of the oldest rocks is difficult to determine.
Geologists use radiometric dating to estimate how long ago rocks formed, and to infer the ages of fossils contained within those rocks. Radioactive elements decay The universe is full of naturally occurring radioactive elements. Radioactive atoms are inherently unstable; over time, radioactive "parent atoms" decay into stable "daughter atoms. When molten rock cools, forming what are called igneous rocks, radioactive atoms are trapped inside. Afterwards, they decay at a predictable rate.
Radiometric dating calculates an age in years for geologic materials by measuring the presence of a short-life radioactive element, e. The term applies to all methods of age determination based on nuclear decay of naturally occurring radioactive isotopes. Bates and Jackson To determine the ages in years of Earth materials and the timing of geologic events such as exhumation and subduction, geologists utilize the process of radiometric decay.