This site, part of Exploring Earth Investigation by McDougal Littell and TERC, examines how to investigate scientific phenomena. The investigations "were designed to build students' knowledge of Earth Science...
Free, interactive programs allow you and your students to learn more about our home planet and to journey into space using video-conferencing and Web casts. Students of all ages are able to speak directly with NASA...
This site uses an interactive applet to demonstrate epicycles and deferents. These historical methods for predicting planetary motion, developed by early Greek astronomers, facilitate the understanding as the user can...
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