For Teachers  (Grades 5-8, PDF),  (Grades 9-12, PDF) The Force of Gravity Gravity - It's Great! Gravity Lesson Plans Center of Gravity Gravitational Forces Gravity - Free Presentations in PowerPoint format for K-12 Science See Also: Universal Forces in Nature 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!