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Follow-Up Questions<br />
1. What metal made the penny appear silvery?<br />
2. What made the penny appear gold in color?<br />
3. If the penny is heated too strongly it changes back to a copper color. Suggest a<br />
reason for this.<br />
4. If you had actually changed your penny into gold, how much would it be worth? You<br />
may use any means you wish to find the selling price of gold.<br />
5. What is the name given to an alloy made from the two metals found in a penny?<br />
6. Pennies minted prior to 1982 are made from an alloy composed of approximately<br />
98% copper and 2% zinc.<br />
a. Why might a penny be made of an alloy instead of pure copper?<br />
b. If one of these pennies were examined microscopically, it would appear<br />
uniform throughout. Would you predict the penny to be heterogeneous or<br />
homogeneous?
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