Learn all about atoms (protons, neutrons and electrons) and see historical models of them.
Structure of the Atom (Grades 6-8)
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Simple explanation of the different types of levers
Enchanted Learning
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I admit this website is not well organized, BUT it has HILARIOUS pictures and diagrams of photosynthesis. The tree-hugger girl picture and its caption is uproarious. This site may help convince students the importance of photosynthesis when they complain how boring it is.
Exploring Science and Technology
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Description and diagram of the various types of matter. Provides sample questions and answers that help students differentiate among heterogenous and homogeneous mixtures, elements and compounds.
Classifying Matter
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Basics about atoms, including structure and behavior.
NYU.edu
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A great site to help kids learn the difference between physical and chemical changes.
Learner.org
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This gives a table of colors by which to identify different compounds in flame tests.
About.com: Chemistry
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