C1 3 Metals & their uses - answers
Across
6. Alloy of iron containing small amounts (1-5 %) of other metals. Low-alloy steel
8. A reaction in which oxygen is removed (or electrons are gained). reduction
10. The process of extraction of metals from ores using plants. phytomining
12. Heating a metal ore in order to extract its metal. smelting
13. A mixture of metals (and sometimes non-metals). For example, brass is a
mixture of copper and zinc. alloy
14. When on element takes the place of another in a compound. displace
15. A shiny, corrosion-resistant metal used to make alloys. titanium
16. The breakdown of a substance containing ions by electricity. electrolysis
17. Huge reaction vessels used in industry to extract iron from its ore. Blast
furnace
18. Rock which contains enough metals to make it economically worthwhile to
extract the metal. ore
Down
1. These elements are from the central block of the periodic table. They have
typical metallic properties and form coloured compounds. Transition metals
2. An alloy of iron with small amounts of carbon or other metals, such as nickel
and chromium, added. steel
3. Process of extraction of metals from ores using microorganisms. bioleaching
4. Alloy of iron containing controlled, small amounts of carbon. Carbon steel
5. A low density, corrosion-resistant metal used in many alloys including those
used in the aircraft industry. aluminium
7. The impure iron taken directly from a blast furnace. Cast iron
9. A chromium-nickel alloy of steel which does not rust. Stainless steel
11. Expensive alloy of iron mixed with relatively large proportions of other metals.
High-alloy steel
Dr Barker 2011