Minerals Quiz

Question 1

Crystallography

Answer 1

Scientific study of the structure and symmetry of crystals

Question 2

Crystal Faces

Answer 2

The planar, flat surfaces of a mineral grain that stopped growing when it was still in contact with gas or liquid.

Question 3

Chemical properties

Answer 3

Some minerals react with dilute hydrochloric acid. Other minerals taste salty as a result of chemical reactions that take place on the surface of our tongues.

Question 4

Physical properties

Answer 4

Determined by the mineral composition structure colour and the Lester of its surface.

Question 5

Colour

Answer 5

Different colours are related to the impurities.

Question 6

Streak

Answer 6

The colour of a fine green powder of a mineral is called a streak.

Question 7

Luster

Answer 7

Appearance of a mineral surface in reflected light

Question 8

Metallic minerals

Answer 8

Often subject to oxidation, tarnish, or other forms of chemical weathering that might alter their appearance

Question 9

Thin sections

Answer 9

Carefully ground slices of minerals and rocks mounted on glass slides

Question 10

Submetallic lustre

Answer 10

Elester that seems intermediate between metallic and nonmetallic. Might be affected by tarnish or oxidation like rust on steel

Question 11

Vitreous

Answer 11

Resembles the lustre or sheen of glass

Question 12

Resinous

Answer 12

Resembles a resin like Amber or dried Tree sap

Question 13

Silky

Answer 13

A silk like reflection of light from thin parallel mineral fiber’s

Question 14

Pearly

Answer 14

Resembles lustre of a pearl

Question 15

Earthy

Answer 15

Lacking reflection like dry soil (dull)

Question 16

Waxy

Answer 16

Resembles wax

Question 17

Satin

Answer 17

Resemble Sat and cloth

Question 18

Greasy

Answer 18

Looks like it’s covered in a thin film of oil or grease

Question 19

Opaque minerals

Answer 19

Do not allow light to pass through them

Question 20

Euhedral

Answer 20

Well developed Crystal faces. Only develop if Crystal is unrestricted as it grows in a gas or liquid

Question 21

Subhedral

Answer 21

Mineral grains are partly bound by well formed crystals

Question 22

Anhedral

Answer 22

Mineral grains grew into the space between existing solid mineral greens and have no apparent crystal faces on their grain boundaries

Question 23

Cleavage

Answer 23

The tendency of some minerals to break Along flat, parallel surfaces

Question 24

No cleavage

Answer 24

No broken parallel surfaces

Question 25

One cleavage

Answer 25

Basal (book) Cleavage. Split apart along flat sheets

Question 26

Two cleavage is intersect at or near 90°

Answer 26

Prismatic cleavage. Elongated forms that fracture a long short rectangular cross sections

Question 27

To cleavages do not intersect at 90°

Answer 27

Prismatic cleavage. Elongated forms that fracture a long short parallelogram cross sections

Question 28

Three cleavages intersect at 90°

Answer 28

Cubic cleavage. Shapes made up of cubes and parts of cubes

Question 29

Three cleavages do not intersect at 90°

Answer 29

Rhombohedral cleavage. Shapes made of rhombohedrons and parts of rhombohedrons

Question 30

Forming cleavages intersect at 71° and 109° to form octagons which split along hexagon shaped surfaces many have secondary cleavages at 60° and 120°

Answer 30

Octahedral cleavage. Shapes made of octahedrons in parts of octahedrons

Question 31

Six cleavage is intersect at 60° and 120°

Answer 31

Dodecahedral cleavage. Shapes made of dodecahedrons and parts of the decahedrons

Question 32

Muscovite, biotite, chlorite

Answer 32

Basal cleavage

Question 33

Plagioclase Pyroxene Orthoclase

Answer 33

Prismatic 90°

Question 34

Halite | Galena

Answer 34

Cubic cleavage

Question 35

Fluorite

Answer 35

Octahedral cleavage

Question 36

Sphalerite

Answer 36

Dodecahedral cleavage

Question 37

Calcite | Dolomite

Answer 37

Rombohedral not at 90

Question 38

Amphibole

Answer 38

Prismatic not at 90

Question 39

Quartz

Answer 39

No cleavage

Question 40

Fracture

Answer 40

Any break in a mineral that does not occur along a cleavage playing is called

Question 41

Conchoidal

Answer 41

Smooth curved fracture surfaces, like glass

Question 42

Uneven

Answer 42

Rough irregular fracture surfaces

Question 43

Hackly

Answer 43

Breaks along jagged services like broken metal

Question 44

Splintery

Answer 44

Splinters like wood

Question 45

Fibrous

Answer 45

Separates into soft fibres like cloth

Question 46

Hardness

Answer 46

Minerals hardness is a measure of its resistance to scratching

Question 47

Softest material one on hardness scale

Answer 47

Talc

Question 48

Hardest material 10 on hardness scale

Answer 48

Diamond

Question 49

Hard minerals

Answer 49

Can scratch glass but cannot be scratched with a knife blade or masonry nail

Question 50

Soft minerals

Answer 50

Will not scratch glass but can be scratched with a knife blade or masonry nail

Question 51

Tenacity

Answer 51

Substance resists pulling or breaking apart. Brittle, malleable, elastic or flexible

Question 52

Reaction to acid

Answer 52

If mineral effervesces or physics or not

Question 53

Hardness scale 2

Answer 53

Gypsum

Question 54

Hardness scale three

Answer 54

Calcite

Question 55

Hardness scale four

Answer 55

Fluorite

Question 56

Hardness scale six

Answer 56

Orthoclase feldspar

Question 57

Hardness scale seven

Answer 57

Quartz

Question 58

Hardness scale eight

Answer 58

Topaz

Question 59

Hardness scale nine

Answer 59

Corundum

Question 60

Fingernail

Answer 60

Hardness 2.5

Question 61

Wire nail

Answer 61

Hardness 4.5

Question 62

Glass, masonry nail, knife blade

Answer 62

Hardness 5.5

Question 63

Streak plate

Answer 63

Hardness 6.5

Question 64

Striations

Answer 64

Straight hairline grooves on the cleavage services of Crystal faces

Question 65

Magnetism

Answer 65

Magnetic minerals are attracted to a magnet. Such as magnetite