1. The Rock Cycle
Chapter 3, Section 1

2. Rocks
A rock is any solid mass of mineral-like matter that occurs naturally as part of our planet.
A few rocks are composed of only one mineral, but most are a mixture of many minerals
Some rocks consist of organic material (non-mineral material)
Some rocks have no crystalline structure
The three main types of rocks are igneous rocks, sedimentary rocks, and metamorphic rocks

3. Rocks

4. The Rock Cycle
Interactions among Earth’s water, air, and land can cause rocks to change from one type to another. The continuous processes that cause rocks to change make up the rock cycle

5. The Rock Cycle

6. Igneous Rocks
Magma – molten material that forms beneath Earth’s surface
When magma cools and hardens beneath the surface or as the result of a volcanic eruption, igneous rock forms
Lava – magma that reaches the surface

7. Igneous Rocks

8. Sedimentary Rocks
Weathering – process in which rocks are physically and chemically broken down by water, air, and living things
Sediments – weathered pieces of earth materials
Eventually, sediments are compacted and cemented to form sedimentary rocks

9. Sedimentary Rocks

10. Metamorphic Rocks
When sedimentary rocks are buried deep enough, they are subjected to changes in pressure and temperature
Under extreme pressure and temperature conditions, sedimentary rock will change into metamorphic rock
If subjected to higher pressure and temperature changes, metamorphic may reform into magma

11. Metamorphic Rocks

12. The Rock Cycle

13. Compaction & Cementation
Igneous Rocks
Weathering & Erosion
Cooling
Magma
Sediments
Melting
Compaction & Cementation
MetamorphicRocks
SedimentaryRocks
Pressure & Heat

14. Igneous Rock

15. Sediment

16. Sedimentary Rock

17. Metamorphic Rock

18. Magma!

19. Igneous Rock

20. The Rock Cycle
The last step: buffing up the rock
Buff Up

21. Assignment Read Chapter 3, Section 1 (pg. 66-69)
Do 3.1 Assessment #1-8 (pg. 69)