What is a mineral, trait, and cleavage

Mineral: a solid inorganic substance of natural occurrence.

Trait: a distinguishing quality or characteristic, typically one belonging to a person.
Cleavage: a sharp division; a split.

Answerwill have thinner; have thicker oceanic sediments;

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!