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<p>[QUOTE=&quot;alwayslost, post: 280331, member: 7155&quot;]That is a real good suggestion from hontonai from a science standpoint. Not only does it take into account your love of coins&nbsp; it also gets the attention of the science teacher. I would make it interesting and at the start explain about Archimedes in ancient greece who had the task of determining if a kings crown was made of real or fake gold. </p><p><br /></p><p>For example, if you had a unc copper penny and a new penny made from different metals, you could make a little boat and put the copper penny in the little boat and measure how much water it displaces. You could then take a new alloy penny and do the same and see that the amount of water displaced is not the same showing the relative density differences.</p><p><br /></p><p>Since it would be hard to measure the displacement of one penny you could use ten and then the amount of water displaced would be easily measureable in a small container filled with water. The more pennies used the more accurate your measurement.[/QUOTE]</p><p><br /></p>

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