1. S1E1: Geologic Time Season: History of Life
Series: Evolution
Season: History of Life
S1E1: Geologic Time
Objective: Create a model showing how time has shaped Earth
Do this: Have a seat and get out your notebook and movie notes

2. 15 MIN QUIZ!

3. Timescale Divides Earth’s history based on major past events
Scientists use evidence like fossils and rock records to organize major changes or events that have occurred

4. Time scale is divided into a series of units based on the order of different groups of rocks and fossils
3 Basic Units
Eras - lasts tens of thousands of millions of years
3 eras - Cenozoic, Mesozoic, Paleozoic
Periods - last tens of millions of years
most commonly used
Associated with rocks layers
Epochs - last several million years