rocks and minerals

Question 1

mineral

Answer 1

a solid chemical compound with a fairly well defined chemical composition

Question 2

rock

Answer 2

he solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surface or underlying the soil or oceans

Question 3

element

Answer 3

those elements that occur in nature in uncombined form with a distinct mineral structure

Question 4

compound

Answer 4

which are homogeneous solids formed from a chemical compound arranged in an orderly manner

Question 5

crystal

Answer 5

are arranged in a highly ordered microscopic structure

Question 6

color

Answer 6

indicator of the types of minerals present, and the specific type of rock.

Question 7

luster

Answer 7

it may have the sheen of polished metal, or that of an unpolished metal that is pitted by weathering

Question 8

streak

Answer 8

a mineral is the color of the powder produced when it is dragged across an un-weathered surface

Question 9

cleavage

Answer 9

refers to the way some minerals break along certain lines of weakness in their structure

Question 10

fracture

Answer 10

A fracture is any separation in a geologic formation, such as a joint or a fault that divides the rock into two or more pieces. A fracture will sometimes form a deep fissure or crevice in the rock.

Question 11

density

Answer 11

the mass of a substance per unit volume, and is highly variable in crustal rocks

Question 12

ore

Answer 12

typically metals, that can be mined, treated and sold at a profit

Question 13

metallic minerals

Answer 13

These deposits can consist of a variety of metallic minerals containing valuable metals such as nickel

Question 14

non metallic minerals

Answer 14

They are more abundant than metallic mineral

Question 15

gemstone

Answer 15

is a piece of mineral crystal which, in cut and polished form, is used to make jewelry or other adornments.

Question 16

igneous rock

Answer 16

or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava

Question 17

sedimentary rock

Answer 17

that are formed by the accumulation or deposition of mineral or organic particles at the Earth’s surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles to settle in place.

Question 18

metamorphic rock

Answer 18

Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary