1. Use the graphic organizer provided to complete this activity

2. Paleozoic Era Oldest Youngest Label it oldest to youngest

4. Shallow seas cover most of the land. Explosion of life in the sea. Trilobites, Mollusks and other shelled animals live in these sea. Images of trilobites. Do not draw

5. Warm shallow seas still cover the earth. First animals with backbones appear.

6. Early continents collide. Coral reefs appear. Basic land plants appear.

7. Seas rise and fall over North America. Age of Fishes First amphibians reach land (frogs) Color the box with the word Devonian with a color of your choice. This period is important for the appearance of fish.

8. North America and Europe are tropical. First reptiles appear Insects are plentiful.

9. Pangea forms (supercontinent) Reptiles are dominant. Mass extinction of marine animals, trilobites disappear. Signals the end of the Paleozoic era Color the box with the word Permian with a color of your choice. This period is important for the mass extinction of marine life.

10. Mesozoic Era Cenozoic Era Oldest Youngest Label it oldest to youngest

11. Under the word Mesozoic, write the word “Dinosaur” This era is the Age of Reptiles

12. Pangea is dominant land formation Age of Reptiles Dinosaurs appear Evergreen trees ore dominant (Pines, Ferns and Palm trees)

13. North America separates from Africa and South America. Largest dinosaurs thrive. Birds appear Flying reptiles appear Color the box with the word Jurassic with a color of your choice. This period is important for the appearance of birds.

14. Dinosaurs dominate First flowing plants appear Continents move toward their present day positions Mass extinction at the end causes the disappearances of many land and marine life forms, including the dinosaurs

15. Under the word Cenozoic, write the word “Mammal” This era is the Age of Mammals

16. Age of Mammals begins Modern groups such as horses, elephants and primates appear. Ancestors of humans appear Color the box with the word Tertiary with a color of your choice. This period is important for the appearance of mammals.

17. Thick glaciers appear and disappear. Great mammals thrive but die when the Ice Age ends 10,000 years ago. Modern humans evolve about 10,000 years ago. Under the word Quaternary, write “current age” We live in the quaternary period of the Cenozoic Era.