1-2+Links+for+Lesson

Earth Layers Video media type="youtube" key="ukqe_6L9V54" width="425" height="350"

http://www.learner.org/interactives/dynamicearth/structure.html

media type="youtube" key="uGcDed4xVD4" width="425" height="350"

http://www.learner.org/interactives/dynamicearth/plate.html

http://earth.rice.edu/mtpe/hydro/hydrosphere.html

http://geography.about.com/od/physicalgeography/qt/atmcomposition.htm

http://earthguide.ucsd.edu/earthguide/diagrams/atmosphere/

http://science.pppst.com/spheres.html

http://geography.about.com/cs/earthquakes/a/ringoffire.htm

http://en.wikipedia.org/wiki/Pacific_Ring_of_Fire

http://www.enchantedlearning.com/subjects/dinosaurs/glossary/Contdrift.shtml

http://www.infoplease.com/ipa/A0001765.html

http://www.crystalinks.com/rof.html