Bug Biology  -  Investigate and study insects here.

Chem4Kids  -  Elements and the periodic table.

Department of Energy  -  Energy information for kids including glossaries, energy sources, a home energy audit and more.

Flash Earth  -  Satellite and aerial imagery of the earth.

How Stuff Works  -  Easy-to-understand explanations of how the world actually works.  All topics are covered to demystify the world in a clear-cut way.

LiveScience  -  Science, technology, health and environmental news.

Measurement/Unit Conversions  -  Find out how to convert measurements of all kinds: weight, volume, temperature, size, distance. etc.

National Geographic for Kids  -  Animals, nature, stories and facts.

National Weather Service  -  Weather from NOAA, the National Oceanic and Atmospheric Administration.

Nature Wages War  -   Resources for students about earthquakes and tsunamis.

New York Times  -  interactive sites about:  The Crippled Japanese Nuclear Reactors, Map of the Damage from the Japanese Earthquake, and How Shifting Plates Caused the Earthquake and Tsunami in Japan.

NSTA -  Outstanding Science Trade Books for Students K–12: 2009

Periodic Table of the Elements  -  Periodic table.

Science Lab  -  Online stop for science stuff.

U.S. Geological Survey  -  earthquake information here.

Weather.com  -  National and local weather forecast, radar, map and report.

Why Files  -  Well-researched, educational descriptions of the actual science behind current news stories.