Ch 3+4 Vocabe

Front 1

cleavage

Back 1

physical property of some minerals that causes them to break along smooth flat surfces

Front 2

fracture

Back 2

physical property of some minerals that causes them to break with uneven, rough or jagged surfaces

Front 3

hardness

Back 3

measure of how easily a mineral can be scratched

Front 4

luster

Back 4

describes the way a mineral reflects light from its surface; can be metallic or non metallic

Front 5

mineral

Back 5

naturally occuring inoragant solid that has a definite chemical composition and an orderly internal atomic structure

Front 6

speacific gravity

Back 6

radio of a mineral's weight of an equal volume of water

Front 7

streak

Back 7

color of a mineral when it is in powdered form

Front 8

basaltic

Back 8

describes dense dark colored igneous rocks formed from magmam rich in magnesiam and iron and poor in silcia

Front 9

granite

Back 9

describes generally light colored silcia, rich igneous rock, that is less dense than basaltic rock.

Front 10

igneous rock

Back 10

rock formed when magmam or lava cools or hardens

Front 11

lava

Back 11

multen rock that flows from volcanoes

Front 12

metamorphic rock

Back 12

forms when heat pressure or fluids and igenous sedimentary or other metamorphic rock to change it form or composition or both.

Front 13

rock

Back 13

mixture of one or more minerals, rock fragments, volcanic gas, organic matter, or other natural minerals; can be igneous metamorphic, or sedimentary.

Front 14

rock cycle

Back 14

model that describes how rocks slowly change from one form to another throughout time.

Front 15

sedimentary rock

Back 15

forms when sediments are compacted and cemented together or when minerals form from solutions.