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1. Let us evaluate the following statements whether it is describes the different types of plate boundaries or types of stress. Is where plates move apart. Divergent Plate Boundary

2. Plates move into one another. Convergent Plate Boundaries

3. Where plates move sideways in relation to each other. Transform plate boundary

4. Causes rocks to fold or fracture. It squeezes rocks together. Compression is the most common type of stress in convergent plate boundaries. Compressional stress

5. Happens when forces slide pass each other in opposite direction which results to slippage and translation. This is the most common stress found in transform plate boundaries. Shear stress

6. Continental Drift Theory Vanessa J. Gayoso Subject Teacher

7. Get to know the scientist who introduced the theory of continental drift. Learning Outcomes Explain the theory of continental drift. Show how continents look like in the past.

8. He first presented his hypothesis in 1912. In 1915, he published “The Origin of Continents and Oceans,” which contained his theory on continental drift. Alfred Wegener Wegener was a German geophysicist and meteorologist.

9. Why did geologists and other experts initially reject Wegener‘s theory? Discuss with a partner:

10. Continental Jigsaw Puzzle Wegener noticed that continents resemble jigsaw puzzle pieces. South America Africa The coastlines of South America and Africa match and appear to fit together.

11. Then Wegener proposed that all continents were once part of a single landmass or supercontinent called the Pangaea. Now Pangea broke up millions of years ago, and continents began to “drift” to reach their present-day positions. permian 250 million years ago PRESENT DAY Continental Drift Theory

12. How Pangea broke up and moved away from each other to their current positions Continental Drift Theory permian 250 million years ago pangaea triassic 200 million years ago laurasia tethys sea gondwanaland jurassic 145 million years ago

13. Continental Drift Theory cretaceous 65 million years ago PRESENT DAY How Pangea broke up and moved away from each other to their current positions

14. Geologists soundly denounced Wegener's theory of continental drift after he published the details in a 1915 book called "The Origin of Continents and Oceans.“ Scientists did not accept Wegener’s theory of continental drift.

15. One of the elements lacking in the theory was the mechanism for how it works—why did the continents drift and what patterns did they follow?

16. Wegener suggested that perhaps the rotation of the Earth caused the continents to shift towards and apart from each other. Which is not the reason why continents drift.

17. Today, we know that the continents rest on massive slabs of rock called tectonic plates. The plates are always moving and interacting in a process called plate tectonics.

18. Summary Alfred Wegener Proposed the theory of continental drift in 1915. Continental Drift Theory States that continents were once a single landmass, then slowly and gradually moved to reach their present-day positions

19. What are the other pieces of evidence used by Wegener and other scientists to support the continental drift theory? Choose one piece of evidence and explain it through a science poster. Assignment