Across
- 5. The gas and aerosol envelope that extends from the ocean, land, and ice-covered surface of a planet outward into space.
- 6. A colourless, pungent gas composed of nitrogen and hydrogen.
- 11. Electrical ___ is a measure of a material's ability to conduct an electric current.
- 12. What country produced the most copper in 2016?
- 14. Chemical ___, any substance composed of identical molecules consisting of atoms of two or more chemical elements.
- 15. A metallic substance composed of two or more elements, as either a compound or a solution.
Down
- 1. The process by which a metal is obtained, either as the element or as a simple compound, from its ore.
- 2. What's the name of a thin green protective coating that bulids up on copper over time?
- 3. The science of extracting metals from their ores and modifying the metals for use.
- 4. Where was copper first cast to shape in molds?
- 7. A colourless, odourless, tasteless gas essential to living organisms.
- 8. What is copper's physical state at 20ºC?
- 9. A naturally occurring homogeneous solid with a definite chemical composition and a highly ordered atomic arrangement; it is usually formed by inorganic processes.
- 10. By combining copper with which chemical element can we get brasses?
- 13. Capacity of a material to deform permanently (e.g., stretch, bend, or spread) in response to stress.