Mangrove Booklet
Chapter+12+geologic+time
Warm Up 1/10/08 1. 1. Fossils are the ____. a. oldest layers of rock in a region b. objects that people of long ago left behind as artifacts c. living.
NOTE CHECK What is the difference between relative and absolute dating? What is superposition? What era did humans first appear?
Unit 2. Record of geologic events and major changes in life forms (mass extinction or new life) By studying the characteristics of rocks and the fossils,
Geologic Time Chapter 8. Determining geological ages Relative age dates – placing rocks and geologic events in their proper sequence Numerical dates –
Warm Up 1) 1) Atoms with the same atomic number but different mass numbers are called ____. a.ionsc. neutrons b.protonsd. isotopes 2) 2) Radiocarbon dating.
