1. Rocks & Minerals
ROCKS

2. Rocks Rocks are made of more than one mineral
Could have other substances comprising them
blue.utb.edu/.../PHYS1417SPR00/Unit3Lec.html

3. Rocks Classification classified by geologic process that formed them (origin of rocks)

4. Rock Classification How were the rocks formed - magma
- erosion and layering
- heat and pressure

5. Origin of rocks
Igneous rocks are formed from the cooling of magma or lava
Lava is magma that reaches the earth’s surface

6. Origin of rocks
Sedimentary rocks formed from other rocks that are broken into small particles and moved by erosion (wind or water)
particles are squeezed or cemented together
Rocks are layered

7. Origin of rocks Metamorphic rocks formed from other rocks
pushed deep into the earth’s crust
Pressure and heat cause them to change shape, color, grain and structure

8. Properties
Texture
Grain
Minerals
Color

9. Texture Texture is how a rock looks and feels
texture in rocks is determined by the size, shape, and pattern of a rocks grains.
ocal.wasp.uwa.edu.au/.../rock/rock16.jpeg

10. Grain Size -- large, small Shape --smooth, rough, round jagged
Pattern – rows, waves, swirls, beads or random patterns

11. Rock cycle