Standard Science Primary 3 Diversity

Luke tried to scratch a glass bottle with a plastic ruler. He found that the plastic ruler did not leave any marks on the glass. This shows that __________.

A plastic is stronger than glass
B glass is more flexible than plastic
C plastic is harder than glass
D glass is harder than plastic
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Worked Solution

Step 1: Hardness is the ability of a material to resist being scratched. Step 2: If Material A cannot scratch Material B, then Material B is harder. Step 3: Glass resisted the plastic ruler.

Correct answer: glass is harder than plastic

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