1 / 16

Chapter 9 Plate Tectonics

Chapter 9 Plate Tectonics. 9-1 Continental Drift 9-2 Sea-Floor Spreading 9-3 Theory of Plate Tectonics 9-4 Mechanisms of Plate Motion. Continental Drift Hypothesis. Proposed by Alfred Wegener in 1915 The continents were once joined to form a single landmass called Pangaea.

thora
Download Presentation

Chapter 9 Plate Tectonics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 9Plate Tectonics 9-1 Continental Drift 9-2 Sea-Floor Spreading 9-3 Theory of Plate Tectonics 9-4 Mechanisms of Plate Motion

  2. Continental Drift Hypothesis • Proposed by Alfred Wegener in 1915 • The continents were once joined to form a single landmass called Pangaea. • About 200 million years ago, Pangaea began to break up. The continents drifted to their present locations.

  3. Evidence • Fit of the Continents… like puzzle pieces • Types of Fossils • Types of Rock • Ancient Climates

  4. Plate Tectonics Puzzle • Cut out the 7 landmasses. They don’t need to be perfect. Make sure you include the shaded areas. • Use the evidence on each landmass to fit them together to make one large landmass (Pangaea). • Raise your had once you think you have it… before you glue it. • Glue the pieces on the paper after it has been checked.

  5. Plate Tectonics Puzzle • This is what your finished puzzle should look like. • Make sure you turn it in with your name(s) on it.

  6. Plate Tectonics Puzzle • 250 million years ago: Supercontinent Pangaea • 200 million years ago: A rift forms between N. America and Africa. This will become the Atlantic Ocean. • 100 million years ago: Rifting continues between major land masses and India moves north. • 50 million years ago: Australia and Antarctica separate. • Now: 6 main landmasses & India collides with Asia

  7. Plate Tectonics Puzzle • Animation… Pangaea would be during the Permian • http://www.wiley.com/college/strahler/0471480533/animations/ch13_animations/animation3.html • Animation with Plates • http://www.eduplace.com/kids/socsci/ca/books/bkf3/imaps/AC_01_005_drift/AC_01_005_drift.html

  8. Major Plates • The lithosphere is broken into large pieces called plates. • 7 Major Plates • North American • South American • African • Antarctic • Eurasian • Australian-Indian • Pacific

  9. Fossil Evidence • Several types of fossil organisms have been found on different landmasses. • The landmasses are now separated by oceans so how could the organisms gotten from one continent to the other?

  10. Fossil Evidence… Specific Fossils • Mesosaurus • Lived in fresh water lakes and shallow bays

  11. Fossil Evidence… Specific Fossils • Glossopteris • Fern species of plant

  12. Fossil Evidence… Specific Fossils • Lystrosaurus • Mammal, about the size of a pig

  13. Rock Types • Mountain belts formed from the same type and age of rock are spread over different continents without crossing the ocean.

  14. Ancient Climates • Global climate changes can be mapped across continents. • These climates do not fit with the climates of today. • For example… There is evidence of glaciers across southern Africa, S. America and Australia.

  15. Continental Drift Hypothesis Rejected • Wegener could not provide a mechanism, or a way, for the plates to move. • His hypothesis was rejected until the 1960s.

More Related