Earth's Structure
Materials:
Wax crayons
6" Styrofoam balls
Cutouts of the continents,
Give each student a large Styrofoam ball (6-in.). Using a knife cut a large wedge out of the ball so it can be seen to the center. (These could be pre-cut to keep the students from using a knife.) Draw lines to show the relative thickness of each layers. Color with wax crayons. Label. Put cutouts of continents on the outside. Summarize what was learned.
Natural Science, http://server2.greatlakes.k12.mi.us/explorer/GLCbrowse/Natural^Science/index.html