Rocks And Minerals: Question Preview (ID: 22339)

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Basalt contains the greatest quantity of which mineral?
a) pyroxene b) olivine c) potassium feldspar d) biotite
Compared to felsic igneous rocks, mafic igneous rocks contain greater amounts of
a) iron b) quartz c) potassium feldspar d) aluminium
Which mineral is white or colorless, has a hardness of 2.5, and splits with cubic cleavage?
a) halite b) quartzite c) calcite d) pyrite
Which sedimentary rock is most likely to be changed to marble during regional metamorphism?
a) limestone b) sandstone c) siltstone d) shale
An igneous rock which has crystallized deep below the Earth's surface has the following approximate composition: 70% pyroxene, 15% plagioclase, and 15% olivine. According to the Earth Science Reference Tables, what is the name of this igneous rock?
a) gabbro b) scoria c) basalt d) pegmatite
Extremely small crystal grains in an igneous rock are an indication that the crystals formed
a) over a short period of time b) deep below the surface of the Earth c) from an iron-rich magma d) under high pressure
The physical properties of a mineral are largely due to its
a) internal arrangement of atoms b) organic composition c) luster d) density
Which characteristic provides the best evidence about the environment in which a rock was formed?
a) texture b) color c) size d) shape
Large rock salt deposits in the Syracuse area indicate that the area once had
a) a warm, shallow sea b) a range of volcanic mountains c) many terrestrial animals d) large forests
Igneous rocks form by which processes?
a) melting and solidification b) heat and pressure c) erosion and deposition d) compaction and cementation
Most sedimentary rock has been formed by which two processes?
a) compaction and cementation b) heat and pressure c) erosion and deposition d) melting and solidification
Sedimentary rocks formed by compaction and cementation of land-derived sediments are classified on the basis of
a) particle size b) composition c) texture d) rate of formation
Which property is most useful in mineral identification?
a) hardness b) color c) texture d) grain size
Certain minerals usually break along flat surfaces, while other minerals break unevenly. This characteristic is due to the
a) internal arangement of atoms b) force with which the mineral is broken c) age of the mineral d) luster of the mineral
Which mineral scratches dolomite and is scratched by olivine?
a) plagioclase feldspar b) galena c) halite d) quartz
Which mineral leaves a green-black powder when rubbed against an unglazed porcelain plate?
a) pyrite b) graphite c) hematite d) halite
Which sedimentary rock would be formed by the compaction and cementation of particles 0.0008 centimeters in diameter?
a) siltstone b) sandstone c) shale d) breccia
The grouping of rocks as igneous, sedimentary, and metamorphic is based primarily upon differences in
a) origin b) age c) size d) color
Regional metamorphism causes mineral grains to
a) align and flatten b) smooth out and build up c) disperse and thin out d) crystalize
What metamorphic rock type has the minerals pyroxene and mica, visible platy crystals of mica and shows a foliated texture?
a) schist b) phyllite c) gneiss d) metaconglomerate
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