Unit 3: Minerals Quiz

On Mohs' hardness scale, ordinary window glass has a hardness of about

5-6

Which mineral reacts readily with hydrochloric acid to produce visible bubbles of carbon dioxide gas?

Calcite (CaCO3)

Which of the following minerals is an OXIDE? Potassium-feldspar (KAlSi3O8) Calcite (CaCO3) Gypsum (CaSO4) Halite (NaCl) Hematite (Fe2O3)

Hematite (Fe2O3)

Which of the following minerals is formed by two-dimensional sheets silicon-oxygen tetrahedron structure?

Muscovite

Which of the following minerals is a silicate? Sulfur (S) Calcite (CaCO3) Halite (NaCl) Gypsum (CaSO4) Plagioclase feldspar ((Ca, Na)AlSi3O8)

Plagioclase feldspar ((Ca, Na)AlSi3O8)

Which of the common minerals is a sulfide? Potassium-feldspar (KAlSi3O8) Pyrite (FeS2) Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) Gypsum (CaSO4) Quartz (SiO2)

Pyrite (FeS2)

Which of the following minerals is formed by 3-D framework silicon-oxygen tetrahedron structure? Biotite Hematite Muscovite Quartz Graphite

Quartz

Which of the following is a mineral? Water vapor Volcanic glass Window glass Synthethic diamond Snowflake

Snowflake

The ability of a mineral to break down along a preferred planar plane is called_______.

cleavage

Polymorphs are

minerals that have the same chemical composition but different structure