Simulate radiocarbon dating
Finally, students will do a radioactive simulation with pennies to reinforce the skills they learned about radioactive decay.
Sometimes we know from tree-ring counting that one sample is a certain number of years before another, or we know that samples come from a continuously accumulating sediment.Students will need a 100 'marked' dice (a piece of tape on one side of each) to conduct the "How Old Is That Rock?Roll the Dice & Use Radiometric Dating to Find Out" hands-on geology project.Dating an artifact found on a dig or evaluating the age of a rock requires special kinds of calculations and assessment.One important approach used in geologic dating involves radioactivity.We understand centuries based on family trees and history books, and we have a conceptual sense of a few thousand years.
But when it comes to talking about a rock that may be billions of years old, what do we do?
Dendrochronology and radiocarbon dating have intertwined histories, she explains, with roots firmly planted at the UA.
A 1929 edition of National Geographic boasts, "The Secret Of The Southwest Solved By Talkative Tree Rings." The 35-page article, penned in whimsical prose, was written by Andrew Douglass, the UA scientist who invented tree ring science. In addition to his work as an astronomer at the UA's Steward Observatory, Douglass was the first to discover that tree rings record time.
Students will be introduced to being science/math detectives by trying to figure out the relationship of organisms using graphs.
Students then are introduced to the controversy around the Shroud of Turin, which has been carbon dated.
In its most conventional form, dendrochronology works like this. They have no bias, and they have no political agenda; they just stand at locations all over the world," says Charlotte Pearson, an assistant professor of dendrochronology at the UA, studies samples under a microscope.