For Teachers Gravity and Black Holes (Grades 5-8, PDF), (Grades 9-12, PDF) Imagine Black Holes  Black Holes - Download Free Posters, Free Information Booklets  Black Holes - Free Presentations in PowerPoint format for K-12 Science See Also: Outer Space 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!