Question

Approximately ________ different minerals are known?

1) 440,000
2) 440
3) 4,400,000
4) 44
5) 4,400

Answer 1

Approximately 5,575 different minerals are known according to the International Mineralogical Association. Most rocks are composed of just a few common minerals.

Step-by-step explanation:

Approximately 5,575 different minerals are known according to the International Mineralogical Association. However, most rocks are composed of just a few common minerals. In fact, only seven minerals make up 84% of Earth's crust. So, when you find an unknown rock, there is a good chance that at least one of those seven minerals will be present.