Yahooligans -Wow! If you're trying to look up any scientific topic, here's a fun place to start... especially for grades 7-10. Good gravy!... there's even homework answers (I didn't tell you that)!
Stereo Image of the Solar System- Got your red- blue 3D glasses? This site has fantastic planet images in 3D! Psychedelic, freak me out man! (Do you kids still talk like that?)
Ask an Expert - Too lazy to find the answer yourself? Itchingly curious about the green lumps on your scalp? Ask an expert! This site brings together scientists from all disciplines to answer your questions.