Rocks and Minerals Review ESRT

The minerals talc, muscovite mica and quartz are similar because they

• have the same hardness

• are the same color

• contain silicon and oxygen

• break along cleavage planes

Which mineral is commonly mined as a source of the element lead (Pb)?

• Galena

• Quartz

• Magnetite

• Gypsum

The breakage pattern shown in the mineral to the left is

• Fracture

• Cleavage

Which mineral has a metallic luster, a black streak, and is an ore of iron?

• Galena

• Magnetite

• Pyroxene

• Graphite

Which property was used to classify these minerals?

• Color

• Luster

• Chemical Composition

• Hardness

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

• Gypsum

• Fluorite

• Potassium Feldspar

• Quartz

Which test is not reliable in identifying minerals

• Streak

• Luster

• Specific Gravity

• Color

How is an igneous rock formed?

• Compaction and/or cementation of sediments

• Solidification of magma or lava

• Heat and/or pressure

Is this igneous rock intrusive or extrusive?

• Intrusive

• Extrusive

Is pumice mafic or felsic?

• Mafic

• Felsic