Fall Final Exam - Minerals

Front

What is the definition of a mineral?

Back

A mineral is a naturally occurring, inorganic solid with a definite chemical composition and a crystalline structure.

Front

What is cleavage in minerals?

Back

Cleavage is the tendency of a mineral to break along flat, even surfaces.

Front

What is fracture in minerals?

Back

Fracture is the way a mineral breaks other than along cleavage planes, resulting in uneven surfaces.

Front

What is the hardness scale used for minerals?

Back

The Mohs scale of hardness ranks minerals from 1 (talc) to 10 (diamond) based on their ability to scratch one another.

Front

What is the significance of streak in mineral identification?

Back

Streak is the color of a mineral in powdered form, which can help identify the mineral more accurately than its external color.

Front

What is the definition of density in minerals?

Back

Density is the mass of a mineral per unit volume, often expressed in grams per cubic centimeter (g/cm³).

Front

What is the difference between metallic and non-metallic minerals?

Back

Metallic minerals have a shiny appearance and conduct electricity, while non-metallic minerals do not have a metallic luster and are insulators.

Front

What is the defining characteristic of pyrite?

Back

Pyrite, also known as 'fool's gold', is characterized by its brassy yellow color and metallic luster.

Front

What mineral is known for its cubic cleavage and high density?

Back

Galena is known for its cubic cleavage and high density, often appearing gray or black.

Front

What is the unique property of hematite?

Back

Hematite is known for its reddish-brown streak and can be magnetic.