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Relative age dating also means paying attention to crosscutting relationships.Say for example that a volcanic dike, or a fault, cuts across several sedimentary layers, or maybe through another volcanic rock type.The first lesson, Isotopes of Pennies, deals with isotopes and atomic mass.The second lesson, Radioactive Decay: A Sweet Simulation of Half-life, introduces the idea of half-life.

Understand how decay and half life work to enable radiometric dating.Play a game that tests your ability to match the percentage of the dating element that remains to the age of the object.This lesson is the third in a three-part series about the nucleus, isotopes, and radioactive decay.Atoms may stick together in well-defined molecules or they could be packed together in large arrays.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.

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Theoretically, if one could detect the amount of carbon-14 in an object, one could establish that object’s age using the half-life, or rate of decay, of the isotope.

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