Page 135 - Science Class 6 Times Publication

Activity 12.6

Observe the sound produced by different objects while hitting. You
may use steel plate, bowl, bell, spoon, wooden table, desk, brick, etc

to produce sound. What difference would you nd in the sound of
metals and non-metals?

Thus, the properties of metals can be summarized as:
1. Metals are generally hard solids. But mercury is the metal
which is found in liquid state.

2. Metals are the good conductors of heat and electricity.
3. The metals are malleable, i.e. metals can be beaten into thin
sheets.
4. Metals are ductile, i.e. metals can be drawn into wires.

5. Metals are sonorous, i.e. they produce a tinkling sound while
beating.
6. Generally the metals have high melting and boiling points.

Uses of metals

Metals are very important in our daily life. We use metals to make
different appliances, equipments, engines, machines, vehicles,
buildings, etc. The main uses of metals can be summarized in the
following points:
1. Gold, silver and copper are used to make ornaments and medals.

2. They are also used to make coins. So, copper, silver and gold are
also known as coinage metals.
3. Metals are used to make household appliances and tools.

4. They are used to make weapons and other tools.
5. Metals are used to make engines, machines and vehicles.

6. They are also used in the construction of railway tracks, bridges
and buildings.
7. Metals are used to make electrical wires.

Times' Crucial Science and Environment 131 Book 6