This site has some great information to help you better understand Earth’s crust and the movement of plates. (
http://www.solarviews.com/eng/earthint.htm
)
Click on the plate tectonics activity to observe what happens at plate boundaries. Then explore the rest of the site to find out more about plate tectonics. (
http://www.pbs.org/wgbh/aso/tryit/tectonics/
)
Observe some photographs showing the effects of mechanical weathering. (
http://www.classzone.com/books/earth_science/terc/content/visualizations/es1201/es1201pag...
)
This detailed, interactive animation summarizes the processes of the rock cycle. (
http://www.classzone.com/books/earth_science/terc/content/investigations/es0602/es0602pag...
)
This site has a wealth of illustrations, animations, and information to help you learn about plate tectonics. Be sure to check out the "mid-ocean ridges" animation near the bottom of the page. (
http://www.visionlearning.com/library/module_viewer.php?mid=65&l=&c3
)
This site has information and animations on plate tectonics and the rock cycle, as well as some information on the carbon cycle. (
http://www.planetguide.net/book/chapter_2/earth_solid.html
)