1. GEOLOGIC TIME Time scale app?

2. PRECAMBRAIN Longest era Longest era Earth was inhospitable Earth was inhospitable Still cooling Still cooling No atmosphere No atmosphere

3. STROMATOLITES Oldest known fossil Oldest known fossil 3.5 billion years 3.5 billion years cynobacteria cynobacteria Began producing oxygen Began producing oxygen Simple cell- no nucleus Simple cell- no nucleus

5. PALEOZOIC Life flourishes in the ocean Life flourishes in the ocean Trilobites dominate era Trilobites dominate era

6. Cambrian Multi-cellular life in seas begin Multi-cellular life in seas begin First shells First shells

7. Ordovician First fish First fish

8. Ordovician

9. SILURIAN First land plants First land plants Fern-like Fern-like Sea life continues to flourish Sea life continues to flourish ammonite

10. DEVONIAN Fish/ sharks Fish/ sharks First insects appear First insects appear

11. Carboniferous (Mississippian & Pennsylvanian) swampy swampy Huge insects Huge insects Eventually created coal deposits Eventually created coal deposits

12. PERMIAN Reptiles Reptiles First amphibians First amphibians Life in sea and land thriving Life in sea and land thriving

13. MASS EXTINCTION THE GREAT DYING 80% of species went extinct!

15. What happened? Climate got hotter Climate got hotter Siberian traps Siberian traps volcanoes = CO 2 volcanoes = CO 2

16. MESOZOIC Dinosaurs now dominate Dinosaurs now dominate PANGEA is formed PANGEA is formed

17. TRIASSIC Beginning of dinosaurs Beginning of dinosaurs Many small Many small Primitive mammals Primitive mammals

18. JURASSIC Dinosaurs get bigger Dinosaurs get bigger First birds First birds

19. ARCHAEOPTERYX

20. CRETACEOUS Intelligent dinosaurs (T- rex, raptors) Intelligent dinosaurs (T- rex, raptors) First flowering plants First flowering plants Carnivorous mammals Carnivorous mammals

21. MASS EXTINCTION K/T BOUNDARY Dinosaurs go extinct

22. Asteroid theory Asteroid caused climate change Asteroid caused climate change 1 st - dust blocked out sun 1 st - dust blocked out sun 2 nd - trapped in heat 2 nd - trapped in heat

23. Evidence for asteroid theory? Crater Crater Irridium Irridium Found in space rocks Found in space rocks Shocked quartz Shocked quartz

24. CENOZOIC Mammals dominate- Mammals dominate-

25. Tertiary Mammals Mammals First hominoids First hominoids

26. Ardi Ardipithecus ramidus 4.4 my 4.4 my

27. Lucy 3.5 my 3.5 my Bipedal hominid Bipedal hominid

28. Lucy LUCY

29. QUATERNARY ice ages ice ages Mammoths/mastodons Mammoths/mastodons Neanderthals Neanderthals

30. present When will a new geologic time period start? When will a new geologic time period start?

32. resources http://universe-review.ca/R10-19-animals.htm http://universe-review.ca/R10-19-animals.htm http://universe-review.ca/R10-19-animals.htm