Exercise 1. There are the materials below. Choose appropriate words from the list to the definitions.

coal, iron, clay, granite, jasper, diamond, gold, steel, copper, tin, aluminium, silver, nickel, quartz, manganese, sulfur, titanium.

1. The chemical element of atomic number 13. Silver-gray metal.
2. Red-brown metal.
3. Strong and hard silver-gray metal. It is used for construction, especially in the form of steel.
4. Hard rock consisting of quartz and mica, used as a building stone.
5. Chemical element used in alloys, notably bronze.
6. Black rock used as fuel.
7. Reddish-brown stone, chalcedony.
8. An important component of special steels and magnetic alloys.(AN is 25).
9. Silver-white metal. It’s a part of various minerals. North American: a five-cent coin.​