the Moh's scale of hardness is used by doing what to the materials
heating tool extensions protection classified scratching as a base how they move Cladistics
A B C D E F G H
To figure out the hardness of a mineral, the Moh's scale of hardness is used.
the Moh's scale of hardness is used by scratching the materials
the Moh's scale of hardness is used by doing what to the materials (A) heating (B) tool extensions (C) protection (D) classified (E) scratching (F) as a base (G) how they move (H) Cladistics