Page 339 - Primary Six Notes

Importance of rocks

 Rocks form soil, which is important to our survival

 Rocks make good materials for building and roads.

 They tell us about the earth’s history.

 They contain many valuable minerals

mm µ+L ,r

N.
m
r

V

8. Alloys

An alloy is a mixture of two or more metals

Alloy Combination Uses

Brass Copper and Zinc Decorating orna-

ments

Making wires, tubing

cases for bullets.

Dentist Amalgam Gold and Copper, Making coins.

gold, copper and

mercury

Solder Lead and Tin Joining metals

Bronze Copper and Tin Used for ornaments ,

bells , statues