Question 3:
Diagram 3.1 shows the apparatus set-up to study the hardness of bronze and copper blocks.
(a) Diagram 3.2 shows the results of experiment.
Measure the diameter of dent for bronze and copper blocks.
Bronze: ……………. cm
Copper: ……………. cm
[2 marks]
(b) The hardness of metal is based on the diameter of the dent produced.
(i) Which block produces a bigger diameter of dent?
[1 mark]
(ii) Compare the hardness of both blocks.
[1 mark]
(iii) Bronze is always being chosen as construction material to build monument. Based on the observation in Diagram 3.2, why is the choice made?
[1 mark]
Answer:
(a)
Bronze: 0.9
Copper:1.4
(b)(i)
Copper block
(b)(ii)
Bronze block is harder than copper block / Copper block is softer than bronze block
(b)(iii)
Bronze is more harder/ stronger
Diagram 3.1 shows the apparatus set-up to study the hardness of bronze and copper blocks.
(a) Diagram 3.2 shows the results of experiment.
Measure the diameter of dent for bronze and copper blocks.
Bronze: ……………. cm
Copper: ……………. cm
[2 marks]
(b) The hardness of metal is based on the diameter of the dent produced.
(i) Which block produces a bigger diameter of dent?
[1 mark]
(ii) Compare the hardness of both blocks.
[1 mark]
(iii) Bronze is always being chosen as construction material to build monument. Based on the observation in Diagram 3.2, why is the choice made?
[1 mark]
Answer:
(a)
Bronze: 0.9
Copper:1.4
(b)(i)
Copper block
(b)(ii)
Bronze block is harder than copper block / Copper block is softer than bronze block
(b)(iii)
Bronze is more harder/ stronger