Chapter 5 Lesson 3The Theory of

Plate Tectonics You tube 5:43

We Didn’t Start the Fire SongYou Tube 4:31

http://www.windows2universe.org/earth/images/earth_plates_usgs_L_2_jpg_image.html

Divergent BoundaryYou Tube :27

Divergent Boundaries animation

Divergent Boundaries: Between two tectonic plates that are moving away from each other. Divergent boundaries that are in continents makes rifts which produce rift valleys. Most active divergent plate boundaries are between oceanic plates and exist as mid-oceanic ridge. Divergent boundaries also form volcanic islands, which happen when plates move apart to make gaps which molten lava rises to fill.

Convergent Boundary

Convergent Boundaries: are formed when crust is destroyed and is forced back into the mantel as one plate dives under another. when that happens substitution zones are formed. Mountains and volcanoes can be found where plates converge. There are 3 types of convergent boundaries: Oceanic-Continental Convergence; Oceanic-Oceanic Convergence; and Continental-Continental Convergence.

Convergent Boundary Video You Tube: 8:44

Plate Boundary Rap - You Tube 2:34

Transform Boundary

Transform Fault boundaries: Transform-Fault Boundaries are where two plates are sliding horizontally past one another. These are also known as transform boundaries or more commonly as faults.Most transform faults are found on the ocean floor. they are normally are surrounded by mid ocean ridges

Slides: 2,3,4http://mohumes.wikispaces.com/How+Does+An+Earthquake+Occur%3F

Transform boundaries and hot spots – YouTube 5:14

North Section of the Great Rift Valley.

Great Rift Valley in Kenya Africa

An elongated valley formed by the depression of a block of a planet's crust between two faults or groups of approximately parallel faults (see also graben). As the faults move apart, the central area between them slips down. The friction produced by this slippage can cause earthquakes and also melt rock which is then released on the surface from volcanoes. Large and well-known rift valleys include the Great Rift Valley in East Africa, the Rheingraben, and Valles Marineris on Mars

http://www.daviddarling.info/encyclopedia/R/rift_valley.html

Rift Valley

volcanoes

Deep-ocean trenchConvergent boundary

Oceanic crust

Subduction

Mid-ocean ridgeSea-Floor spreading

DivergentBoundry

Rift Valley

Convec tion

Transform Boundary

Convergent BoundaryMountains

Continental Crust

1.Volcanoes 2.Deep-ocean trench Convergent Boundaries3.Mid-ocean Ridge Sea-Floor Spreading 4. Divergent Boundaries5. Transform Boundary 6. Convergent Boundary 7. Mountains 8. Rift Valley9. Subduction 10. Convection 11. Continental Crust12. Oceanic Crust

Earth’s Changing Crust