Radiometric Dating

Materials

Procedures

  1. There are four (4) bags represent four (4) different “fossils”.
  2. Determine how many half-lives the isotope has gone through and therefore the age of the “fossil”.
  3. (initial # of parent isotopes = # of parent isotopes + # of daughter isotopes)
    (# of parent isotopes÷ initial # of parent isotopes × 100 = _____ %)
  4. Graph the rate of decay for U-235 and U-238.
  5. Determine the number of half-lives by locating the % on the graphs.

Data

"Fossil" # # of Parent Isotope # of Daughter Isotope % of Parent Isotope # of Half-Lives Age of "Fossil"
1 ??? ??? ??? ??? ???
2 ??? ??? ??? ??? ???
3 ??? ??? ??? ??? ???
4 ??? ??? ??? ??? ???

Analysis

1. Rank the fossils from oldest to youngest. ???
2. Draw a picture of their relative position in a cross-section layer of soil. ???
3. Why is Uranium used in this case? ???



How to do this assignment?

Physics in February