Geology Minerals Quiz

When a mineral breaks along a smooth, flat plane it is called

• crystal form

• cleavage

• fracture

• faces

Minerals in which mineral group will often react to hydrochloric acid by effervescing?

• sulfides

• silicates

• carbonates

• native elements

The simplest way to judge the specific gravity of a mineral is through

• fracture

• volume

• hefting

• streak

A crystal with six sides that meet at 90º angles has a ______ crystal form.

• hexagonal

• cubic

• rhombohedral

• octahedral

In general, the worst property to identify most minerals is

• hardness

• color

• clevage/fracture

• streak

The most common minerals in the lithosphere are

• carbonates

• oxides

• silicates

• halides

When a mineral breaks along an uneven or curved surface it is called

• crystal form

• tenacity

• cleavage

• fracture

Aluminium foil and copper wire both have a _______ luster.

• metallic

• greasy

• vitreous

• glassy

Hardness is measured on the _____ Scale of Hardness.

• Fracture

• Mohs

• Glass

• Cryptocrystalline

The way a mineral reflects light is called _______ by geologists.

• specific gravity

• streak

• luster

• fracture