1. Earth Science Lab Practical Review

2. Station 1: Rocks and Minerals
COLOR
-Least useful property
STREAK
CLEAVAGE/FRACTURE
-Porcelain Streak plate
DENSITY/HEFT
LUSTER
How are Minerals Identified??
-Metallic or Non-metallic
CRYSTAL SHAPE
HARDNESS
-Glass plate
INTERNAL ARRANGEMENT OF ATOMS
SPECIAL PROPERTIES

3. STREAK
The color of a mineral when finely powdered

4. LUSTER Metallic – reflects light like metal (shiny)
Nonmetallic – any mineral which DOES NOT exhibit shiny metallic characteristics

5. LUSTER- Now you try…
NON-METALLIC

6. LUSTER- Now you try…
NON-METALLIC

7. LUSTER- Now you try…
METALLIC

8. Hardness
Resistance of a mineral to being scratched

9. Hardness
If the mineral SCRATCHES the glass – it has a hardness of 5 or higher.
If the mineral DOES NOT SCRATCH glass – it has a hardness of below 5.

10. CLEAVAGE/FRACTURE
Cleavage- when a mineral break along a flat, smooth surface
Fracture- when a mineral breaks along an irregular surface

11. CLEAVAGE OR FRACTURE
CLEAVAGE

12. CLEAVAGE OR FRACTURE
CLEAVAGE

13. CLEAVAGE OR FRACTURE
FRACTURE

14. ROCKS SEDIMENTARY ROCKS -cementation -compaction -fossils -layers
-form underwater
-pieces and parts of other rocks

15. ROCKS METAMORPHIC ROCKS -HEAT + PRESSURE! -Foliated -Recrystallization
-Banding
-Mountains
Schist
Gneiss

16. -Solidification of magma or lava
ROCKS
IGNEOUS ROCKS
-Solidification of magma or lava
-Glassy
-Vesicular
-Extrusive
-Intrusive
Pumice
Obsidian
Scoria
Diorite