http://www.windows2universe.org/earth/images/earth_plates_usgs_L_2_j pg_image.html 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 midoceanic ridge. Divergent boundaries also form volcanic islands, which happen when plates move apart to make gaps which molten lava rises to fill. Convergent Boundary Video You Tube: 8:44 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. Plate Boundary Rap - You Tube 2:34 Transform boundaries and hot spots – YouTube 5:14 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: 2,3,4 http://mohumes.wikispaces.com/How+Does+ An+Earthquake+Occur%3F Great Rift Valley in Kenya Africa North Section of the Great Rift Valley. 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 volcanoes Transform Boundary Deep-ocean trench Convergent boundary Divergent Boundry Mid-ocean ridge Sea-Floor spreading Convergent Boundary Mountains Rift Valley Oceanic crust Subduction Convec tion Continental Crust 1.Volcanoes 2.Deep-ocean trench Convergent Boundaries 3.Mid-ocean Ridge Sea-Floor Spreading 4. Divergent Boundaries 5. Transform Boundary 6. Convergent Boundary 7. Mountains 9. Subduction 10. Convection 11. Continental Crust 12. Oceanic Crust 8. Rift Valley