Question

Talc can be scratched by all other minerals because it has a 1 on the ______ scale. Diamonds on the other hand cannot be scratched by any other mineral (besides another diamond) because it is a 10 on the ___ scale a Luster b Streak c Crystal structure d Hardness

Answer 1

Talc can be scratched by all other minerals because it has a 1 on the **hardness** scale. Diamonds, on the other hand, cannot be scratched by any other mineral (besides another diamond) because it is a 10 on the **hardness** scale.

So the correct answer is **d Hardness**.