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This webpage contains a definition of the physical science concept of matter as any substance which has mass and occupies space, and all physical objects are composed of matter, in the form of atoms, which are in turn composed of protons, neutrons, and electrons. The Phases of Matter are also discussed on this site as well.
http://physics.about.com/od/glossary/g/Matter.htm
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Bioaccumulation or biomagnification is the process by which contamination of the environment by persistent chemicals, including endocrine disrupters and other toxicants, leads to the accumulation of these chemicals by an entire ecosystem.
http://www.emcom.ca/EM/bio.shtml
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Do you know your elements? Click on any element on this table and learn about that element's appearance, abundance, reactions, and much more. There is even an encyclopedia link for each element.
http://www.chemicool.com/
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This website contains numerous 3-dimensional models showing the structure of important compounds, such as foods, drugs, and fuels. It also contains links to suggested activities.
http://www.worldofmolecules.com/
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Your kids will be amazed when they see a slice of potato mysteriously float in the exact center of a glass of water. It is not magic; it is an investigation in density. Be sure to check out Liquid Rainbow, a great extension/assessment activity.
http://www.mcrel.org/whelmers/whelm49.asp
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How can Physical Properties Be Used to Identify Matter?
No Key Lesson
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