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•  Why Big Ships Don't Sink
http://www.onr.navy.mil/focus/ocean/
Explanation about why boats float and directions for an experiment to make an aluminum foil boat that will hold weight. Also information about and directions for activities that demonstrate how submarines dive, why things float better in salt water, and why icebergs float.

•  Biographies of Scientists
Here are some sites to research scientists and their work:

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Staff: Kimberly McIntyre, Circulation & Science Kits