SPM Science 2019, Paper 2 (Question 4)

Question 4:
Diagram 3 shows an experiment to study the resistance towards corrosion of an alloy and a pure metal.

Diagram 3

Table 3 shows the condition of both spoons after three days.

Table 3

(a) Based on the observation in Diagram 3, complete Table 3. [1 mark]

(b) State one hypothesis for this experiment. [1 mark]

(c) What is the responding variable in this experiment? [1 mark]

(d) The following list is examples of substances.

Classify the substances into alloy and pure metal in Table 4. [2 marks]

Table 4

(a) No change

(b) A steel spoon does not rust easily as compared to an iron spoon.

(c) Rusting of spoon


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