Learning Target: I will understand that some methods of dating earth materials are based on calculating the rate of radioactive decay of isotopes contained in rocks.
BR(19) What is an isotope?
1. Geologic Time Pre-Test pg 25
2. Read Section 5 pg 80-85 in Book F
3. Read Geologic Time Scale pg 28
4. Answer the questions pg 29
Homework: Finish anything needed
