Remember Minerals?

Minerals are the earth’s inorganic solid material that have an orderly chemical structure and can be identified by physical properties.

 

Minerals are aggregated to form rocks  (collected together)

 

Moh’s Scale

 Scale used to identify hardness of a mineral

            1 very soft    (Talc- scratch with finger nail)

            7 and above are extremely hard  (quartz-  can’t even scratch with metal object)

 

Color- 

    2 types -  actual color of mineral

                -  the color of the streak on a piece of tile

 

Cleavage-  is the way it breaks apart

                        Number of sides after we smash it or break it apart

 

Fracture-  is the type of edges that form

 

Luster-  how it reflects light

 

Specific Gravity-  The density of the mineral as compared to water

 

 

Cleavage and Fracture has to do with the way it breaks

                        If I smash it with a hammer and it breaks in a specific way- it has cleavage

                        If I smash it and it doesn’t have a specific pattern-  it fractures