Minerals

Which rocks usually have the mineral quartz as part of their composition?

• conglomerate, gabbro, rock salt, and schist

• breccia, fossil limestone, bituminous coal, and siltstone

• shale, scoria, gneiss, and marble

• granite, rhyolite, sandstone, and hornfels

Which property of a mineral most directly results from the internal arrangements of its atoms?

• volume

• color

• crystal shape

• streak

Tags

NGSS.MS-PS1-1

The accompanying diagram shows a broken crystal of the mineral halite. The shape of the halite crystal is a direct result of the

• internal arrangement of the atoms in the crystal

• temperature at which the crystal formed

• type of surface on which the crystal formed

• stream erosion that changed the crystal

Tags

NGSS.MS-PS1-1

The diagrams below show the crystal shapes of two minerals. Quartz and halite have different crystal shapes primarily because

• A. light reflects from crystal surfaces

• B. energy is released during crystallization

• C. of impurities that produce surface variations

• D. of the internal arrangement of the atoms

Tags

NGSS.MS-PS1-1

Which two physical properties of graphite make it a good mineral for use in pencils?

• luster and fracture

• cleavage and color

• hardness and streak

• greasy feel and composition

The diagrams below represent fractured samples of four minerals. Which mineral property is best illustrated by the samples?

• hardness

• streak

• cleavage

• density

Which mineral is white or colorless, has a hardness of 2.5, and splits with cubic cleavage?

• calcite

• halite

• pyrite

• mica

Which mineral scratches dolomite and is scratched by olivine?

• galena

• quartz

• potassium feldspar

• muscovite mica

An unidentified mineral that is softer than calcite exhibits a metallic luster and cubic cleavage. This mineral most likely is:

• galena

• pyrite

• halite

• pyroxene

Which mineral will scratch glass (hardness = 5.5), but not pyrite?

• gypsum

• fluorite

• orthoclase

• quartz