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2.  Objective: Identify minerals and their properties.  Homework: Mineral lab Due Friday  Bell work: Are water and ice minerals? Can minerals be found in rocks? Can minerals exist as gas, liquid, and solid?

3.  A mineral is a substance that: Forms in nature Is a solid Has a definite chemical make up  It consists of specific combinations of elements Has a crystal structure  Atoms are arranged in an orderly, repeating, 3-D pattern. chlorine sodium

4.  Are water and ice minerals? Water:  No, it is not a solid Ice:  Yes, it fits all four categories  Can minerals be found in rocks? yes  Can minerals exist as gas, liquid, and solid? No, it has to be a solid

5.  Are all rocks minerals? No A mineral has to have all four characteristics A rock only needs two  It forms naturally and it is solid A rock usually contains two or more types of minerals

6. Cubic Tetragonal Hexagonal OrthorhombicMonoclinic Triclinic

7.  Color and streak  Luster  Cleavage  Fracture  Density  Hardness

8.  The same mineral can be many different colors, but the streak color is generally the same.  Streak: The color of a mineral powder left behind when a mineral is scraped across a surface.

9.  Luster describes the way in which light reflects from its surface.  metallic or nonmetallic.

10.  The tendency to break along flat surfaces.

11.  The tendency of a mineral to break into irregular pieces.

12.  The amount of mass in a given volume.

13.  The resistance of a mineral to being scratched.