1. Intervention Warm Up 10-26-15 write question & answer
Mary was at the beach for five days and found 16 seashells. She plans to give all of her seashells equally to her four friends. How many seashells will each friend get ?

2. Homeroom Warm Up
If you could dress up in any costume, what would you want to be? Write about your favorite costume idea?

3. Science Warm Up

4. Homework Due Tuesday 10-27-15
Page 343
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Write question & answer

5. GLE 0707.7.1 Describe the physical properties of minerals.

6. By Ms. Stanford 7th Grade Science
What is a Mineral?
By Ms. Stanford
7th Grade Science

7. What is a mineral? Definition:
A mineral is a naturally formed, inorganic solid that has a definite crystalline structure.

8. What is a mineral? Properties:
Solid
Cannot be a liquid or a gas
Naturally Occurring
Found in nature, not man-made
Inorganic
Is not alive and never was, non-living
Crystal Form
A definite structure in which atoms are arranged

9. Characteristics
Each mineral has characteristic properties that can be used to identify it.
Color can be used to identify only those few minerals that always have their own characteristic color.
If we take one mineral, beryl, and add different impurities, we get different colors

10. Streak
A streak is the color of the mineral when in powder form.

11. Huanzala, Does de Mayo Province, Peru
Luster
Another simple test to identify a mineral is to check its luster.
Luster is a term used to describe how light is reflected from a mineral’s surface.
Large Pyrite Cluster
Huanzala, Does de Mayo Province, Peru

12. Density
Each mineral has a characteristic density. Density is how much matter is in a given space.

13. Hardness
When you identify a mineral, one of the best clues you can use is the mineral’s hardness.
The Mohs hardness scale ranks ten minerals from softest to hardest.
A mineral can scratch any mineral softer than itself, but can be scratched by any mineral that is harder.

14. A mineral that splits easily along flat surfaces has the property called cleavage.

15. Fracture Most minerals do not split apart evenly.
Instead, they have a characteristic type of fracture, which describes how a mineral breaks roughly and not along a smooth surface.

16. The next few slides show an assortment of items.
Questions to ask yourself when determining if an item is a mineral or not:
Is it non-living material?
Is it a solid?
Is it formed in nature?
Does it have a crystalline structure?
The next few slides show an assortment of items.
As a group, categorize the items as either:
Minerals or Non-Minerals.

17. Wood

18. Gold

19. Fossil

20. Topaz

21. Bones

22. Granite

23. Quartz

24. Pearls

25. Talc

26. Icebergs

27. Diamond

28. Coal

29. Rock Salt

30. And the answers are… Minerals Non-Minerals Gold Topaz Quartz Talc
Iceberg*
Diamonds
Non-Minerals
Wood - once living
Fossils – once living
Bone - living material
Granite - intrusive igneous rock
Pearls – made by oysters
Coal - Sedimentary rock
Rock Salt – Sedimentary rock
According to IMA – ice is listed as a mineral

31. Science Closure
If you break quartz to learn if it splits smoothly in a certain direction, what physical property are you testing?
a. hardness
b. cleavage
c. streak
d. specific gravity

32. Academic Enrichment Closure
Silicate minerals contain a combination of the elements
Sulfur and oxygen
Carbon and oxygen
Iron and oxygen
Silicon and oxygen