It is extremely useful for geologists, because most specimens of a given mineral are very close to the same hardness. ... So, we can conclude that not all the rocks are hard, and the hardness of rocks depends on how the atoms of the rock's minerals are bound to each other and how they are arranged.
Answer:
i am pretty sure answer is A you got this
Answer:
No
Explanation:
Evidence can change and new discoveries are made every day so I don't think so
Hope this helps you