A Science Odyssey - This PBS site lets you build an atom or see how technology has changed in your kitchen over a 100 years. The People and Discoveries section offers scientific biographies. Play "That's My Theory!" and meet Albert Einstein.

Botany.com - This site is an encyclopedia of plants, includes common and botanical names and gardening know-how.

Cells Alive! - Explore cell biology, microbiology, immunology and microscopy on this kid- friendly site.

Chem4Kids - A great introduction to everything chemical.

Dig - Dig is an archaeology magazine for kids but there is a lot on their site to check out.

I Can Do That! - A fun introduction to DNA, RNA, cells, protein and cloning.

If Rocks Could Talk @ Ology.org - The American Museum of Natural History presents great information on all three groups of rocks.

Kids Do Ecology - This site has information about ecology and biomes.

Mineralogy 4 Kids - The Mineralogical Society of America presents a great place to learn about rocks and minerals.

Ology - The American Museum of Natural History's kids' site about the kinds of things people study. Includes an excellent section on paleontology.

Physics.org - This is a fun site that explores physics in everyday life.

Rader's Biology4Kids - This is a great site that has clear information on cells, microorganisms, plants, etc.

Rader's Geography4Kids - This is a great site which includes information on the earth's structure, atmosphere, hydrosphere, etc.

Rader's Physics4Kids - What is physics? Come here to find out.

RocksForKids - Like rocks? This site offers all sorts of information on rocks and minerals.

The Accidental Scientist : Science of Cooking - The science of eggs, pickles, candy, bread, seasonings, meat and much, much more.

The World's Biomes - This site groups biomes into five major types: aquatic, desert, forest, grasslands and tundra. For more information on biomes see the site above called Geography World. (Look under "Around the World".)

Volcano World - Do you know where the earth's volcanoes are located? This site will tell you plus lots of other information too.

Web Weather for Kids! - This site offers weather fun for everyone. Make a thunderstorm or a tornado!

What's it Like Where You Live? - Biomes of the world, freshwater ecosystems, marine ecosystems….

Zoom School: Science & Biology - Great information on animals, dinosaurs, includes several illustrated science dictionaries and a lot more.