Activity 3.3 Class 10 Science

This activity explains ‘Malleability’, a physical property of metals.

Aim of the activity

 To observe the malleability of different metals.

Materials Required

    1. Small pieces of metals – iron, zinc, lead and copper

    2. Hammer

    3. Block of iron

Procedure

We take a piece of iron sample and place it on a block of iron. Now we strike it 4 to5 times with hammer and observe the changes in shape.

 Now we repeat the same process with other sample of metal pieces and observe the change in shape.

 

Observation

Metal	Hammering	Observation
Iron	Slight change in shape	malleable
Zinc	Break down	Brittle
Lead	Becomes flattened	Soft and malleable
Copper	Flattened	Malleable

 

Explanation

When metals like iron, copper and lead are beaten with hammer, they are converted into sheets. This property of metals is known as ‘malleability’.

 Zinc may break down on hammering so it is not malleable.

Conclusion

 This activity demonstrates the malleability of metals which means metals can be beaten into sheets.

Frequently Asked Questions

   1. What is malleability?

Answer – Metals can be beaten into thin sheets, this property of metals is known as malleability.

   2. Which metal is the most malleable in this activity?

Answer – Copper

   3. Which metal is the most malleable of all metals?

Answer- Gold

   4. What happened to zinc when hammered?

Answer – Zinc become brittle and break down.

   5. Why is iron difficult to flatten with hammer?

Answer – Iron is a hard metal and needs great force to change shape.