Determining the Age of Rocks and Fossils, University of California, Berkeley.
The idea of radioactive decay and half lives, a type of absolute dating, is shown through an activity using M&M's candy and graph paper. Sequencing Time, University of California, Berkeley. This 5-12-grade activity lets students place parts of their own life story into a time line so that they can better understand how geologic time is reconstructed by scientists.
Who's on First, University of California, Berkeley. This website is a book chapter about geologic time. This online version of their informative booklet contains short, content explanations about relative time, major geologic time divisions, index fossils for use in age dating, radiometric dating and the age of the earth.
When an element has atoms that differ in the number of neutrons, these atoms are called different isotopes of the element.
Radioactive isotopes are unstable and undergo spontaneous nuclear reactions, emitting particles and/or wavelike radiation.
Geologic time can be estimated by observing rock sequences and using fossils to correlate the sequences at various locations.
Current methods include using the known decay rates of radioactive isotopes present in rocks to measure the time since the rock was formed.You’ll also see how you can tell when a fossilized animal died by comparing the amount of carbon-14 that would have been in a living creature to the amount that’s left in the fossil. In this lesson plan, which is adaptable for grades K-12, students use Brain POP and/or Brain POP Jr.resources to learn about planning projects when they create a science fair exhibit.Technology also provides tools for investigations, inquiry, and analysis.Matter is made of minute particles called atoms, and atoms are composed of even smaller components.These components have measurable properties, such as mass and electrical charge.