Page 133 - Science Class 6 Times Publication

Activity 12.3
To test the conductivity of a metal rod and a wooden bar

Materials required: A metal rod and a dry wooden bar.

Procedure

Heat one of the ends of these both rods for same time with a burner.

Observation

You will feel that the iron rod heats up your palm but the wooden bar
does not.

Conclusion:
Iron is a metal and is a conductor of heat. So, it conducts the heat of

re from burner to your hand.
Malleability and ductility

Metals are malleable. It means that metals can be turned into thin
sheets by hammering. Hence, the property of metal due to which it can
be turned into thin sheets on hitting is called malleability. Similarly,
ductility is the property of metal due to which it can be drawn into
thin wire.

But, when the non-metals are hammered, they break down into

pieces. It means that non-metals are brittle. They are not malleable
and ductile.
Strength

The particles or atoms of metals are very closely packed. So, the
metals are stronger than the non-metals. But sodium metal is so soft
that it can be cut into pieces with a knife.

Times' Crucial Science and Environment 129 Book 6