1. How does the Earth work? Early 1900’s: Continental Drift Early 1900’s: Continental Drift Theory that continents and plates move on the surface of the Earth Theory that continents and plates move on the surface of the Earth No mechanism proposed No mechanism proposed

2. Evidence for continental drift Matching coastlines from early maps Matching coastlines from early maps

3. Alfred Wegener

4. 1915 maps by Wegener of Pangaea

5. Evidence for continental drift Matching Coastlines

6. Evidence for continental drift

7. Matching mountain ranges

8. Evidence for continental drift Matching rock types

9. Evidence for continental drift Matching glacier deposits 300 million years ago

10. Evidence for continental drift Glossopteris fern Glossopteris fern Found on all southern continents Found on all southern continents

11. Evidence for continental drift Matching fossils

12. Evidence for continental drift Matching coastlines Matching coastlines Matching mountains Matching mountains Matching rock types Matching rock types Matching rock ages Matching rock ages Matching glacier deposits Matching glacier deposits Matching fossils Matching fossils