Unit 3, quiz1

Question 1

precious, rare, or valuable mineral

Answer 1

gem

Question 2

having a uniform structure or composition

Answer 2

homogeneous

Question 3

formed from non-living materials

Answer 3

inorganic

Question 4

solid, inorganic substance with a crystalline structure

Answer 4

mineral

Question 5

mineral from which valuable material is extracted

Answer 5

ore

Question 6

What are the 5 classifications for a mineral

Answer 6

It must be natural
Inorganic
Crystal structure
must be solid
homogeneous structure

Question 7

What means same ratio of elements.

Answer 7

homogeneous

Question 8

6 different crystal systems

blocks or cubes (example: salt)

Answer 8

isometric

Question 9

6 different crystal systems

four-sided prisms and double pyramids (example: zircon)

Answer 9

tetragonal

Question 10

6 different crystal systems

six-sided prisms (example: beryl)

Answer 10

hexagonal

Question 11

6 different crystal systems

short, stubby crystals with all sides unequal (example: topaz)

Answer 11

orthorhombic

Question 12

6 different crystal systems

short and stubby, but the sides tilt at each end, like a skewed tetragonal crystal (example: gypsum)

Answer 12

monoclinic

Question 13

6 different crystal systems

flat with sharp edges, but do not have any right angles (example: feldspar)

Answer 13

triclinic

Question 14

Chemical Composition

largest class

Answer 14

silicates

Question 15

Chemical Composition

found in caves

Answer 15

carbonates

Question 16

Chemical Composition

contain sulfurs

Answer 16

sulfides

Question 17

Chemical Composition

contain oxygen

Answer 17

oxides

Question 18

How are gems different from regular minerals?

Answer 18

Gems are rarer than regular minerals.

Question 19

How are precious metals similar to gems?

Answer 19

Both are rare and durable.

Question 20

Minerals can be elements or compounds. T/F

Answer 20

True

Question 21

how a crystal breaks or splits when stressed

Answer 21

cleavage

Question 22

how a mineral appears to reflect light

Answer 22

luster

Question 23

the true color of a mineral in powdered form

Answer 23

streak

Question 24

caused by the chemicals in a mineral

Answer 24

Color

Question 25

Brian stresses a mineral. It breaks cleanly and evenly, leaving a smooth surface. The cleavage can be described as _____.

Answer 25

perfect

Question 26

Luster Types: **opaque and reflective**

Answer 26

metallic

Question 27

Luster Types: **reflective, like glass**

Answer 27

glassy

Question 28

Luster Types: ** little to no reflection**

Answer 28

dull

Question 29

way light reflects from a mineral

Answer 29

luster

Question 30

way a mineral breaks under stress

Answer 30

cleavage

Question 31

reveals true, natural color of a mineral

Answer 31

streak

Question 32

least reliable property for identification

Answer 32

color

Question 33

measured using the Mohs scale

Answer 33

hardness