Dictionary.com http://dictionary.reference.com/
Interactive Periodic Table of the Elements http://www.dayah.com/periodic/
Science News for Kids http://www.sciencenewsforkids.org/
Scientist Biographies http://scienceworld.wolfram.com/biography/
KnowPlay (atlas, thesaurus, rhyming dictionary and much more!) http://www.kplay.cc/reference.html
KidPort Science Index http://www.kidport.com/RefLib/Science/ScienceIndex.htm
How Stuff Works Website http://www.howstuffworks.com/
Physics Tutor http://gbs.glenbrook.k12.il.us/Academics/gbssci/phys/Class/1DKin/1DKinTOC.html
Glossary of Physics Terms http://www.geocities.com/physolv/glossary.htm
Glossary of Chemistry Terms http://home.nas.net/~dbc/cic_hamilton/dictionary/a.html
Homework Helper http://www.homeworkspot.com/middle/science/lifescience.htm
Biome Maps http://images.google.com/images?hl=en&q=biomes&um=1&ie=UTF-8&ei=_5ayStqjCI6qlAe7_934Dg&sa=X&oi=image_result_group&ct=title&resnum=11
Glossary of Life Science Terms http://www.everythingbio.com/glos/index.php