Standard Science Primary 3 Diversity

Ravi wants to test the hardness of four different materials. What is the best way for him to do this?

A Scratch each material with a plastic ruler.
B Check if the material can bend.
C Drop each material from a height.
D Put each material in a basin of water.
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Worked Solution

Step 1: Hardness is the ability of a material to resist being scratched. Step 2: A scratch test is the standard method to compare hardness. Step 3: Option A is the correct procedure.

Correct answer: Scratch each material with a plastic ruler.

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