Standard Science Primary 3 Diversity

Sara used three different rods to scratch each other. The results are recorded in the table. Which rod is the SOFTEST?

A Rod B
B Rod A
C Rod C
D None of the above
Show Worked Solution

Worked Solution

Step 1: Hardness is the ability of a material to resist being scratched. Step 2: A harder material will leave a scratch on a softer material. Step 3: Rod B was scratched by both A and C, and could not scratch either. Thus, B is the softest.

Correct answer: Rod B

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free