1. Falcon Focus 1. A cowboy rides into town on Friday.
He stays two days, then leaves Saturday. How can this be? 2.

2. 570 million years ago to 245 million years ago
Paleozoic Era
Life starts in the seas and moves onto land
570 million years ago to 245 million years ago
Six periods:
Cambrian
Ordovician
Silurian
Devonian
Carboniferous
Permian

3. Paleozoic Era

4. Earth in Early Paleozoic Time

5. QUICK NOTE
When you see this symbol that will tell you it is a sentence you need to write in your notes

6. The Paleozoic Era began with.. early invertebrates
Cambrian Explosion =
Explosion of life
The Paleozoic Era began with.. early invertebrates
Trilobites, Brachiopods
Mostly aquatic invertebrates with exoskeletons = water-dwelling organisms without backbones and hard shells.
How do we know? Found in the fossil record

7. Then came Arachnids and Insects
Paleozoic Era
Early Vertebrate Fish
Jawless fish
Vertebrate = has backbone
Then came Arachnids and Insects

8. Paleozoic Era First Amphibians **First vertebrates on LAND
First Land Plants
Ferns, mosses, cone-bearing plants

9. By the END of the Paleozoic Era…
Seed plants were common
Reptiles became DOMINANT

10. MASS EXTINCTION EVENT Paleozoic Era
Killed off most marine (underwater) invertebrates and amphibians
*Made way for the … DINOSAURS

11. Earth in Early Paleozoic Time

12. View of Earth—Devonian Period (410 MA)

13. View of Earth—Permian Period (260 MA)