Geol hmw 3

Regardless of their size most of

Minerals

Minerals must be solid ,have an orderly atomic structure have a recognized Chemical composition be naturally occurring and

be generally inorganic in origin

A scientist creates diamonds using high-pressure laboratory experiments these diamonds are not considered minerals because which of the following requirements has violated

Minerals must occur naturally

Which of the following is a mineral
Charcoal
ice
granite
water
plastic

Ice

Why is glass not considered a mineral

Glass has a disorderly atomic structure

The principal mineral used in making glass is

Quartz

All of the following criteria defined a mineral except

It is organic

Which of the following substances is a mineral

pearl
granite
quartz
amber
petroleum

Quartz

A rock can be composed of almost entirely one mineral

True

The ___ determines the chemical and physical properties of an Atom

The number of protons

____ are groups of the same kind of Atom they cannot be broken down into other substances by ordinary chemical means

Elements

Match the type of atomic bond with the correct definition (covalent bond)

Chemical bonds created by sharing a pair of electrons between Atoms

Match the type of atomic bond with the correct definition (ionic bond)

Complete transfer of electrons between Atoms

The external expression of minerals orderly internal agreement of atoms is referred to as

It’s crystal form

The property of cleavage reflects

mechanical breakage alone plains of weakness within the mineral

In the field you find in and identify the middle road that is clear exhibits conchoidal fracture and can scratch glass, this mineral is most likely

Quartz

While studying some sedimentary rock in your field area you find the mineral with rhombohedral cleavage that reacts with hydrochloric acid you determine that the mineral is

calcite

What is fractional crystallization

Crystallization of part of a magma leaving behind melted rock with a different composition from the original magma

Why does magma composition change during fractional crystallization

Different elements in the magna form crystals at different rates leave behind more than unused elements

What type of magma would you expect to see after the crystallization of minerals containing significant amounts of iron

A magma depleted in iron

Which of the following statements best represents the relationship between magma in crystals form from that magma

The crystals are denser than the magma

Which of the following is not one of the three primary ways minerals can form

precipitation

biological processes

crystallization of molten material

metamorphism

Metamorphism

Which of the following best describes the term cleavage

Cleavage of the splitting of minerals along natural plains of weakness

Which of the following exhibits three sets of cleavage and 90 angles

Fluorite

Mica

Galena

Calcite

Feldspar

Galena

Hornblende has ____ cleavage planes at____ angles

Two, non-90 degrees

Quartz exhibits

Conchoidal fracture

What causes a lack of cleavage and some minerals

Bonds of equal strength in all directions

The amount or quality of light that is reflected from a mineral surface is known as

Luster

What causes the same mineral to occur in varieties that are different colors

A small amount of impurities in the crystal structure

Which of the following best describes the term streak

The color of a powdered form of middle produced by rubbing it across the hard surface

Since color is not a very useful way to identify minerals what other optical property or properties can be used

Luster and streak

Which of the following best describes mineral habbit

This ain’t a mineral grows into giving sufficient space

What discourages minerals for achieving habit

Enclosed spaces

Crystal habit is the shape that a mineral develops by the repetition of

The basic unit cell of the mineral

Other than space what two additional fact is a significant for a crystal to attain habit

Time in necessary elements

Suppose you found A mineral crystal that look like Topaz what to minerals could you use any scratch test to help determine if the mineral is in the Topez

Corundum and quartz

Hardness describes the minerals

Resistance to being scratched

What is the basic foundation of moh’s hardness scale

if a mineral scratches an object then the mineral is harder in the object

Name the hardest and softest mineral of the moh’s scale

Diamond hardest and talc softest

What mineral is not scratched by fingernail but scratched by copper penny

Calcite

All minerals have cleavage

False

Color is a reliable identification technique for minerals

False

Polymorphs are minerals that will have two identical mineral structures but different chemical compositions

False

The ___ are the mineral class that accounts for more than 90% of earths crust

silicates

Which of the following is a basic structural component of the most common mineral

A silicon oxygen tetrahedron

Ferromagnesian minerals are those that contain a great deal of

Magnesium and iron