Across
- 2. mineral from which metal is extracted
- 4. coated with zinc to prevent rusting
- 8. passing an electrical current through a liquid or solid in order to separate chemical compounds
- 11. force of attraction
- 12. it can be both electrical and thermal
- 13. using a lot of energy
- 15. an alloy of copper, zinc and, often, lead
Down
- 1. an alloy of copper and tin
- 3. a mixture of metals sometimes containing a non-metal, for example carbon in steel.
- 5. limited availability
- 6. waste material intended for recycling
- 7. collective term for small metal items commonly used in buildings.
- 9. small quantities
- 10. single strand of metal
- 14. can be recycled