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Elastic Force and gravity.
I learned that rubber bands are really stretchy and and strong. Also that gravity pulls down Gothenburg center of the earth! Mass is what something is made of and gravity is how much it weighs.
Article posted April 24, 2012 at 02:16 PM •
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Great job I think thE same thing. Great job
Comment Posted on April 26, 2012 at 08:55 AM by
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