1. Unit 2 Topic 2
Rocks

2. Minerals- the building blocks
Naturally occurring
Inorganic
Crystalline structure
Specific chemical composition

3. Halite crystal (salt)
Source: Photograph © The McGraw-Hill Companies, Inc./Bob Coyle, photographer.

4. Galena (lead and sulfur)
Source: Photograph © The McGraw-Hill Companies, Inc./Doug Sherman, photographer.

5. Rock
A naturally occurring solid aggregate of one or more minerals or mineral materials

6. The Rock Cycle Plate tectonics and weathering drive the rock cycle
3 types of rocks on Earth
Igneous
Sedimentary
Metamorphic

7. The Rock Cycle

8. The Rock Cycle Igneous Rocks
Formed by the crystallization/solidification of magma
Granitic or Basaltic
Instrusive: solidified inside Earth
Extrusive: solidified on Earths surface

9. Granite
(intrusive)
Source: Courtesy of Carla W. Montgomery.

10. Obsidian
(extrusive)
Source: Photograph © The McGraw-Hill Companies, Inc./Bob Coyle, photographer.

11. Basalt
Source:Courtesy of Carla W. Montgomery.

12. The Rock Cycle Sedimentary Rocks Chemical precipitation Sedimentation
Limestone (carbonate)
Sedimentation
Sandstone, shale, conglomerate

13. Limestone
Source: Photograph by I.J. Witkind, USGS Photo Library, Denver, CO.

14. Shale
Source: Photograph © The McGraw-Hill Companies, Inc./Bob Coyle, photographer.

15. Sandstone
Source: Photograph © The McGraw-Hill Companies, Inc./Doug Sherman, photographer.

16. The Rock Cycle
Metamorphic Rocks
Changed form
Heat, pressure
Marble