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Geological Dating Part II Absolute

Geological Dating Part II Absolute. Once Living things Interpret Evidence Direct Evidence of past. Fossils. Earth’s history is separated into divisions according to the fossil record:. Eons Eras Periods Epochs. Absolute Age Dating.

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Geological Dating Part II Absolute

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  1. Geological Dating Part II Absolute

  2. Once Living thingsInterpret EvidenceDirect Evidence of past Fossils

  3. Earth’s history is separated into divisions according to the fossil record: Eons Eras Periods Epochs

  4. Absolute Age Dating This method enables scientists to determine the actual age of a rock Radioactive isotopes are found in….

  5. Comparing Relative to Absolute (Numerical)

  6. Radiometric Dating- Rocks • Define • Ratio • Rate The original radioactive element is called the parent and the new element is called the daughter

  7. Rate of decay of a radioactive element in a rock Percent of parent atoms at the 2nd half life is?

  8. Radioactive elements with their specific half-life • The daughter element of U-238 is? • Time for ½ of the U-238 atoms to decay?

  9. Half-Life • At the end of 1 half-life what is the relationship of daughter to parent material? • If 2 rocks were found one containing 2 g of A and the other 4 g of A which rock is older? • What percent of the sample is Daughter B at 4 Half-Lives?

  10. Clocks in Rocks • What is the percent of atoms of the parent and daughter element at a half-life of…? 1, 2 & 5 • How can a scientist determine the actual age with this information? • Now you are ready to click on: http://www.sciencecourseware.org/VirtualDating/files/1.0_ClocksInRocks.html

  11. Coral, Varves, & Tree Growth

  12. Radiocarbon Dating - Organisms • Carbon C-14 is changed into Nitrogen N-14 during decay of living organisms. • Now try this: http://www.sciencecourseware.org/VirtualDating/files/RC0/RC_0.html

  13. Bibliography http://earthsci.org/fossils/geotime/radate/cycle.gif http://www.math.psu.edu/jech/pictures/GrandCanyon/rocks.jpg http://earthobservatory.nasa.gov/Study/Paleoclimatology_CloseUp/paleoclimatology_closeup_2.html www.nps.gov/.../state/tx/1968-7/images/fig26.jpg http://www.calacademy.org/exhibits/california_hotspot/habitat_redwoods.htm http://www.geo.cornell.edu/eas/education/course/descr/EAS302/Timescale.GIFitos.edu/earth -http://www.cerrscience/images/ESCI_110_Lecture_notes_images/Goosenecks.jpg http://geoinfo.amu.edu.pl/wpk/pe/a/harbbook/c_viii/images/geomorph/Car0140.GIF http://serc.carleton.edu/images/quantskills/methods/PBandJ_175.jpg http://evolution.berkeley.edu/evosite/lines/images/strat_column.gif http://comp.uark.edu/~sboss/seds02.jpg http://www-rohan.sdsu.edu/~rhmiller/geologictime/dikesTexas1.jpg http://www.fas.org/irp/imint/docs/rst/Sect2/correlation.jpg http://www.mhhe.com/earthsci/geology/mcconnell/gti/images/utah.JPG http://www-rohan.sdsu.edu/~rhmiller/geologictime/dikesTexas1.jpg http://www.calstatela.edu/faculty/acolvil/sediment/superposition.jpg http://images.google.com/imgres?imgurl=http://www.winona.edu/geology/MRW/mrwimages/Earth%2520History/metrx_dating.JPG&imgrefurl=http://www.winona.edu/geology/MRW/maps.htm&h=553&w=530&sz=65&hl=en&start=2&tbnid=1fEgWVmmSwDmDM:&tbnh=133&tbnw=127&prev=/images%3Fq%3Dradiometric%2Bdating%2Brocks%26gbv%3D2%26svnum%3D10%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26sa%3DG

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