1. Today’s Agenda…
Bellringer: Record your answers to the multiple choice packet on your own sheet of paper. Use capital letters!
Review Fossils and Extinction Packet
BrainPop Videos on Fossils and Extinction
Notes on Geologic Time Scale
Study Guide

2. Geologic Time Scale
Using absolute dating scientists have calculated the ages of many different fossils and rocks
From this information scientists have created a “calendar” of Earth’s history that spans more than 4.6 billion years

3. Geologic Time Scale
Scientists divide Earth’s history into smaller units called eras
Eras are divided into units called periods
Each era and period contains certain events and the presence of certain prehistoric creatures
For example: Dinosaurs in the Mesozoic Era

4. Which time period?
Name the time period in which the following events occurred! 

5. Which time period?
Do we currently live?
Quaternary Period

6. Which time period?
Did amphibians evolve?
Devonian Period

7. Which time period?
Did the first dinosaurs evolve?
Triassic Period

8. Which time period?
Did humans evolve?
Quaternary Period

9. Which time period?
Did the earliest fishes evolve?
Ordovician Period

10. Which time period? Consists of the beginning of Earth’s history?
Precambrian

11. Which time period? Did the earliest reptiles appear?
Carboniferous Period

12. Which time period?
Did land plants and animals evolve?
Silurian Period

13. Which time period? Did plants that reproduce with seeds appear?
Permian Period

14. Which time period?
Did the first birds appear?
Jurassic Period

15. Which time period? Did sponges, clams, snails, and worms evolve?
Cambrian Period

16. Which time period?
Did flowering plants become the most common type of plant?
Tertiary Period

17. Which time period?
Dinosaurs become extinct?
Cretaceous Period

18. Which time period?
Did insects and spiders resembling those of today appear?
Silurian period

19. Which time period?
Did the shark appear?
Devonian period

20. Assignment Complete your study guide Test on Tuesday
Study Packs Due Tuesday