PHSC/210 PHSC210 PHSC 210 WEEK 2 Mastering Geology Assignments 2

PHSC 210 WEEK 2 Mastering Geology Assignments 2 

Mastering Geology Assignments 2

 Item 1

 Part A

The principal mineral used in making glass is:

talc.

gold.

copper.

quartz.

hematite.

 Part B

All of the following criteria define a mineral except:

It is organic.

It has an orderly internal structure.

It has a well-defined chemical composition.

It is naturally occurring.

It is inorganic.

 Part C

Which of the following substances is a mineral?

amber

quartz

granite

petroleum

pearl

Item 2

 Part A

Suppose you found a mineral crystal that looked like topaz. What two minerals could you use in a scratch test to help determine if the mineral is indeed topaz?

Corundum and calcite

Fluorite and calcite

Corundum and quartz

Quartz and apatite

Diamond and corundum

 Part B

Hardness describes a mineral’s __________.

strength

powdered form when rubbed on a streak plate

crystalline structure

resistance to being scratched

quality of reflectivity

Part C

What is the basic foundation of Moh’s hardness scale?

If a mineral scratches an object, then the mineral is harder than the object.

Crystal hardness is directly proportional to crystal size.

Hardness is related to the amount of time a mineral takes to precipitate.

Mineral hardness is comparable to mineral strength.

Mineral hardness can be measured in absolute terms.

Part D

Name the hardest and softest mineral on the Moh’s scale.

Diamond (hardest) and gypsum (softest)

Topaz (hardest) and calcite (softest)

Quartz (hardest) and calcite (softest)

Corundum (hardest) and talc (softest)

Diamond (hardest) and talc (softest)

Part E

What mineral is not scratched by a fingernail, but is scratched by a copper penny?

Calcite

Talc

Fluorite

Dolomite

Gypsum

Item 3

 

Part A

The silicon-oxygen tetrahedron contains:

one silicon atom and four oxygen atoms.

four silicon atoms.

four silicon atoms and one oxygen atom.

one silicon atom and four hydrogen atoms.

two silicon atoms and two oxygen atoms.

 

Part B

The ratio of silicon to oxygen atoms in silicate minerals depends on:

the way the mineral breaks when mechanical forces act on it.

the type of rock in which the minerals are found.

how the atoms in silicon-oxygen tetrahedra are shared.

the density of the mineral.

the number of silicon and oxygen atoms in the mineral.

 

Part C

In silicate minerals, the type of cleavage or fracture is influenced by:

the silica content of the mineral.

the bonding of the silicon-oxygen tetrahedra within the mineral.

the amount of oxygen in the mineral.

the density of the mineral.

the color of the mineral.

 

Part D

The arrangement of the silicon-oxygen tetrahedra in ferromagnesian (iron- and magnesium-bearing) silicate minerals is typically:

in a circle.

in a chain.

as isolated structures.

in a rigid framework.

in sheets.

 

Part E

The mineral fluorite is an example of:

a ferromagnesian silicate.

a sulfide.

a halide mineral.

a native element.

an oxide.

 

Item 4

 

 

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