1. Rise 2011

2. Standard Addressed Students know how to identify common rock-forming minerals (including quartz, calcite, feldspar, mica, and (hornblende*). Grade 4 Wikipedia says: Hornblende is a complex series of minerals. It is not a recognized mineral in its own right. Hornblende is a mixture of three molecules.

3. Rocks & Minerals Rocks are made of 2 or more minerals What’s important?

4. What is a mineral? A mineral is a naturally occurring, inorganic, solid which possesses a characteristic internal atomic structure and a definite chemical composition. A what???............................................................

5. One more time… If we take the definition of a mineral term by term, it becomes easier to understand. Minerals must occur naturally. This means man- made substances such as steel would not be considered to be minerals. Inorganic substances are those substances that are not living and are not formed by living processes. Crystalline solids are those solids in which the atoms composing the solid have an orderly, repeated pattern. Minerals will have definite chemical compositions, but these compositions may vary within given limits.

6. Vocabulary rocks minerals structure luster magnetism geology color crystals cleavage/ fracture characteristic hardness transparency streak

7. Properties of Minerals Color Luster Cleavage Fracture Hardness Transparency Heft/Specific Gravity Crystal formation Streak Special properties: Magnetism, Fluorescence, Odor

8. Mineral Samples 1. Mica 2. Calcite 3. Galena 4. Fluorite 5. Quartz 6. Pyrite 7. Halite

9. Observe your mineral samples

10. Mica Flat Flaky Easily split at the edges May be clear (transparent) or cloudy (translucent)

11. Calcite Many forms, may be shaped like a slanted box

12. Galena Dark gray Heavy for its size Square-shaped edges

13. Fluorite Several forms May be flat and resemble a triangle with its corners broken off

14. Quartz Looks like a piece of clear cut glass Sides are flat and meet at sharp edges

15. pyrite Fools gold

16. halite commonly known as rock salt the mineral form of sodium chloride (NaCl) typically colorless or white, but may also be light blue, dark blue, purple, pink, red, orange, yellow or gray depending on the amount and type of impurities.

17. Your job… Your job is to classify a group of mineral samples based on their hardness. How might this information be useful?

18. Mohs’ Scale for Mineral Hardness Devised in 1822 by Frederick Mohs Still widely used Simple

20. How will you organize your data?

21. The Big Test

23. Claims Evidence

24. Conclusions and Reflections

25. Prize Time

26. Guess My Category ?