| | Known to the Ancients... | | | Across | | | 3. | | Too soft for most tools, early people learned that this metal could be strengthened if it was alloyed with tin or zinc. | | | 4. | | The ancient Romans used this metal to make water pipes. | | | 5. | | Brass, a corrosion resistant alloy, is a mix of copper and this metal. | | | 8. | | The ancient Egyptians made black eye make-up with this element. | | | 9. | | A pale yellow material, this element can be found near volcanoes and hot springs. | | | 11. | | The cheapest and most abundant of all metals, people have been using this element for at least 5,000 years. | |
| | | Down | | | 1. | | This liquid metal has been found in 3,500 year old Egyptian tombs. | | | 2. | | Commonly found as coal or soot. | | | 6. | | Although known to the ancients, this metal was often confused with lead and tin. | | | 7. | | A soft, valuable metal, its purity is measured in carats. | | | 9. | | Frequently used in jewelry, this metal is the best conductor of heat and electricity. | | | 10. | | Bronze, the first alloy created by people, is a mix of copper and this metal. | |
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