1. Wednesday, November 1 Write in your agenda:
Wednesday, November 1 Write in your agenda: Homework: Finish Classwork Open your note guide to page 62 Think About It… What are some methods we can use to identify an unknown rock or mineral?

2. Physical Properties of Minerals
Standard: 7.1 – Use a table of physical properties to classify minerals

4. Identifying Minerals
Each mineral has its own specific properties that can be used to identify it, this is due to the fact that each mineral has its own unique make-up.
Hardness- Mohs Hardness Scale
Color
Streak
Luster
Density
Cleavage and Fracture
Special Properties
Fluorescence
Double Refraction

5. Hardness- Mohs Hardness Scale
Hardness (how hard a mineral is) is one of the best properties that can be used to help identify a mineral
Mohs Hardness Scale ranks 10 minerals from softest to hardest, Talc is softest and Diamond is hardest

6. Mohs Hardness Scale

7. Color a physical property that is easy to observe.
can only be used for a few minerals
does not usually give enough information to make a definite identification.

9. Streak tells the color of a mineral’s powder.
To find the streak of a mineral you rub the mineral against an unglazed tile called a streak plate.

10. Streak

11. Luster
Luster describes how a mineral reflects light from its surface. Such as:
Description Examples
Glassy Quartz
Silky Gypsum
Greasy Talc, some Quartz
Metallic Gold, Pyrite, Galena etc
Earthy Kaolin
Waxy some Serpentine
Pearly Gypsum, some Talc
Resinous Amber
Brilliant Diamond
Dull Graphite

12. Density Density is mass per unit volume.
density is a physical property that will remain the same.
Density= Mass/Volume D=M/V

13. Density
Mass is the amount of matter in an object or material and is measured in milligrams, grams, or kilograms
Volume is the amount of space that an object or material fills and is measured in milliliters, liters, or kiloliters (rarely in kiloliters)
Density = mass /volume g/cm3

14. Density
The density of liquid water is 1.0 grams per milliliter (1.0 g/ml)
Anything > 1.0 g/ml sinks in water
Anything < 1.0 g/ml floats in water

15. Density
LOW DENSITY
HIGH DENSITY

16. Cleavage a split evenly along flat surfaces
due to how atoms are arranged
Mica splits easily along a flat surface

17. Cleavage

18. Fracture A break in an irregular way and does not split apart evenly
Think of bones, bones fracture

19. Fracture

20. Special Properties Fluorescence = can glow under ultraviolet light
Magnetism = attracts iron
Chemical reaction
Taste = salty
Radioactivity = contain uranium or radium
Double Refraction produces two images when something is viewed

21. Special Properties
Fluorescence
Double Refraction

22. DO! Fluorescence Magnetism Chemical Reaction Taste Radioactivity
hardness
Special property
Fluorescence
Magnetism
Chemical Reaction
Taste
Radioactivity
Double Refraction
Cleavage is when a mineral splits evenly along flat surfaces. A fracture is when a mineral breaks in an irregular way

23. DO! Mass is the amount of matter in an object.
Volume is the amount of space an object takes up
Density = Mass / Volume
Density = M / V
20g / 15cm3 = 1.33

24. Keys to Understanding At LEAST 5 complete sentences
Summarize the main points of the lesson
Describe in detail the important ideas
Write about concepts you want to remember
This should be helpful to YOU!