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Across 1. Art made from clay 4. Also known as a floating bridge 5. Aids people who need to move heavy loads 6. Used to help produce steel 9. One of their main devolopments 11. Beginning date of the Han Dynasty 12. Defines locations on maps using Cartesian coordinates 13. The Chinese art of combining medicinal herbs. 14. Domain of materials science that studies the physical and chemical behavior of metallic elements,

Down 2. Using the toxic properties of chemical substances as weapons to defeat enemy 3. An algorithm for the efficient evaluation of polynomials in monomial form 7. Simplest kind of bridge today 8. A sowing device 9. A mathematical term invented by the Han's 10. Ending date of the Han Dynasty