Question

There are two physical properties of minerals that both result in smooth, flat surfaces with specific angles between them. The first property is externally visible and is the result of how the mineral forms; the second is inherently internal and is the result of breaking a sample of the mineral. These properties are called:

hardness and cleavage.
cleavage and hardness.
crystal habit and cleavage.
cleavage and crystal habit.

Answer 1

Answer: Cleavage and crystal habit

Explanation: The cleavage is a property of minerals that deals with the exterior, which includes the smoothness and flat surface.

While the crystal habit is all about the interior arrangement of the particles that make up the mineral. The crystal habit is an interior property, where there is a specified angle and arrangement of particles of a mineral.