GLG 201 4.16.07 - GLG 201 4.16.07 Age dating Relative age...

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GLG 201 4.16.07 Age dating Relative age dating Placing rocks in order of formation No notion of WHEN something happened Absolute age dating Number of years that have passed since an event occurred Radioactivity is the key Before this, no way to date Radioactivity Most isotopes are stable A few are unstable (radioactive) Decays to stable isotope of same element or a different isotope We can use radioactivity to determine exactly how old something is Parent: isotope undergoing decay Daughter: isotope left after decay Alpha decay Beta Decay (electron is emitted) Gamma Decay (photon is emitted) Electron-capture (an electron is captured by the nucleus) Radioactivity Timeline for science of radioactivity 1896: Becquerel discovers RADIOATION Radiation is the energy or particles emitted during decay Uranium discovered by Marie and Pierre Currie
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Radiation sickness was not understood Both probably sick with radiation poisoning He got hit by carriage very young (he was already mysteriously sick) Radioactive Decay
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This note was uploaded on 03/29/2008 for the course GLG 201 taught by Professor Libarkin during the Spring '07 term at Michigan State University.

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GLG 201 4.16.07 - GLG 201 4.16.07 Age dating Relative age...

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