1. Continental Drift Monday, January 23, 2012

2. What planet is this?

4. How do we know that the planet looked this way?

5. What is Continental Drift? The hypothesis that the continents were once together in a single landmass and later broke up and drifted to their present locations Proposed by Alfred Wegener in 1912

6. Evidence to Support the Theory

7. What evidence supported Continental Drift? 1. Jigsaw Puzzle Fit: Continents look like they could fit together like puzzle pieces

8. What evidence supported Continental Drift? 2. Fossils: Matching plant and animal fossils were found on the coastlines of different continents

9. What evidence supported Continental Drift? 3. Rock Formations: -Ages and types of rocks matched across oceans -Mountain chains seemed to continue from one continent to another

10. What evidence supported Continental Drift? 4. Ancient Climates: -Tropical plant remains (coal deposits) found in Antarctica (cold places) -Evidence of glaciers in Africa, South America, India, and Australia (warm places)

11. Continental DriftMs. Grom January 24, 2012 Earth Science What is Continental Drift (CD)? What evidence supports CD? =The hypothesis that the continents were once together in a single landmass and later broke up and drifted to their present locations Proposed by Alfred Wegener in 1912 1. Jigsaw Puzzle Fit: Continents look like they could fit together like puzzle pieces 2. Fossils: Matching plant and animal fossils were found on the coastlines of different continents 3. Rock Formations: 1) Ages and types of rocks matched across oceans 2) Mountain chains seemed to continue from one continent to another 4. Ancient Climates: evidence of former tropical plant in cold places; evidence of glaciers in warm places

12. Problems With The Theory No mechanism for movement of continents Wind and currents could possibly move fossils Theory was not accepted by scientists