Standard Science Primary 3 Diversity

Jun Jie used four different materials to scratch each other to test their hardness. Based on the table, which material is the HARDEST?

A Material A
B Material D
C Material B
D Material C
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Worked Solution

Step 1: Hardness is tested by scratching. A harder material can scratch a softer one. Step 2: Check which material scratched the most others and was not scratched itself. Step 3: Material C scratched all others and has no scratches on it.

Correct answer: Material C

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