NSDL Science Refreshers![]() 1 result returned Resources for Science > Earth Science > Earth Process and Materials > Earth Structure > Crust, mantle, coreUSGS geology in the parks - what on earth is plate tectonics?http://geology.wr.usgs.gov/parks/pltec/index.htmlDiscusses the crust, mantle and core with text and schematic drawings. Links to other sections of the same publication on the lithosphere and plate tectonics. Resource Type: Instructional Material - Tutorial, Reference Material - Nonfiction Reference, Audio/Visual - IllustrationGrade Level: 2, 3, 4, 5, 6 |

