Question

1. minerals that break randomly exhibit _________.
2. the _________ test determines what materials a mineral will scratch.

Explanation:

1. Minerals that break randomly have a property called fracture. Fracture is the irregular breakage of a mineral.
2. The scratch - test is used to determine what materials a mineral can scratch. It is based on Mohs scale of mineral hardness.

Answer:

1. Fracture
2. Scratch