Absolute Dating Tuesday, December 2nd, 2014.

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Presentation transcript:

Absolute Dating Tuesday, December 2nd, 2014

Do Now No Homework Do Now Order the layers from oldest to youngest Describe one of the different principles from the reading yesterday

End of semester grade worth 20% This can only help your grade I recommend that if you have below an 85 you do this assignment Design a board game based on the Matter unit I can give you a grading rubric with requirements and expectations If you choose not to do this, I will enter whatever grade you have for the semester in that spot

Objectives SWBAT define absolute dating SWBAT differentiate absolute dating and relative dating Essential Questions? Compare and contrast absolute and relative dating. How are they the same? How are they different? How can they be used together to form a more accurate picture of the past?

Vocabulary Radiometric dating Half-Life A method of estimating the age of rocks and fossils by using radioactive elements Half-Life What is a half life? The approximate time for half of the radioactive isotope to undergo decay (convert into a different isotope)

Note sheet for today Title: Absolute Dating Date: 12/2 Section: Fossils

Types of absolute dating How do living things obtain their carbon? There are 2 methods of absolute dating mentioned, what are they? How can scientists measure the age of something by using carbon dating? Why does carbon dating only work for 60 thousand years?

Sample TCAP question Determining the age of rocks found near fossils is an important step in understanding evolution. How does radiometric dating determine the age of a fossil. It compares the radioactive to nonradioactive elements in the rocks around the fossil It compares the age of the rocks above and below the fossil It compares the bones of one animal to those of a similar animal It determines where the fossil belongs in the fossil record

How to use radiometric dating Ratio of radioactive to nonradioactive elements

Dendrochronology What is Dendrochronology? Why do tree rings have a lighter area and a darker area? What can tree rings tell us about climate? C/D. How can scientists create a climatic chronology going back thousands of years?

Answer the Essential Question Compare and contrast absolute and relative dating. How are they the same? How are they different? How can they be used together to form a more accurate picture of the past? Use a Venn Diagram or a drawing to help explain your answer

Exit Ticket How are absolute dating and relative dating different? What is one example of radiometric dating? In order to properly date something using radiometric dating you need the ratio of ___________ to ______________.