Which mineral is the hardest on the Mohs hardness scale?
Answer and explanation
Correct answer: D. Diamond
- Step 1: The Mohs scale ranks minerals from 1 to 10 by scratch resistance, and diamond is 10, the hardest. Answer: Diamond. Why not the others: Quartz is 7, talc is 1, the softest on the scale, and corundum is 9.
Practise more Earth Science.
Free questions with an explanation for every one, and full timed Ontario Secondary School Diploma (OSSD) mock tests.
More Earth Science questions
- What does the Big Bang theory say about the universe?
- Which greenhouse gas is released by the burning of fossil fuels?
- Which process drives the movement of tectonic plates?
- Which type of rock forms when magma or lava cools and becomes solid?
- Which seismic body waves cannot pass through Earth's liquid outer core, which creates a shadow zone for them?
- Uranium-235 has a half-life of 704 million years. A rock now holds 25% of the uranium-235 it had when it formed. How old is the rock?