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(This page has been archived and is found on the Internet Archive.) In addition to using answers to students' Analysis questions and their graphs for evaluation, consider having them respond to the following in their science journals or as a homework essay: Pretend you are on a month-long field trip to dig for artifacts that might have been left from the pre-colonial period in the United States.

Write a letter to a friend explaining what radiocarbon dating is.

For students, understanding the general architecture of the atom and the roles played by the main constituents of the atom in determining the properties of materials now becomes relevant.

By the end of the 8th grade, students should know that all matter is made up of atoms, which are far too small to see directly through a microscope.You can continue to fill the funnels as different classes arrive.Empty the graduated cylinders between classes if the volume is more than about 25 ml.However, the carbon-14 that was in the organism at death continues to disintegrate.By measuring how much carbon is left in a sample as well as its radioactivity, we can calculate when the organism died. In this activity, you will work backwards to solve a puzzle, much like scientists work backwards to find the time that an organism died." Procedure Give each student a copy of The Case of the Melting Ice student sheet.

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