For Teachers How does the Earth work? As The Earth Turns - Layers of the Earth Inside the Earth Journey Inside the Earth with Integrated Computer Activities Geology Just Touching the Surface Layers of the Earth - Free Presentations in PowerPoint format for K-12 Science  See Also: Rocks, Minerals For Kids Games & Kids Sites  Resources Free Clip Art Free Presentations in PowerPoint format for K-12 Science  Video Clips for Science    All Rights Reserved    Clip Art Credit: Phillip Martin Have a great year!