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Rocks Rock!!!. Rocks. Rock: A mixture of minerals, rock fragments, volcanic glass, organic matter or other natural materials. Rock Uses. Rocks have been used throughout history for buildings, weapons, tools, and in art. Types of Rocks. There are three main categories of rocks Igneous

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Rocks Rock!!!


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    1. Rocks Rock!!!

    2. Rocks • Rock: A mixture of minerals, rock fragments, volcanic glass, organic matter or other natural materials.

    3. Rock Uses • Rocks have been used throughout history for buildings, weapons, tools, and in art.

    4. Types of Rocks • There are three main categories of rocks • Igneous • Sedimentary • Metamorphic

    5. Igneous Rocks(ig-nee-us)

    6. Igneous rocks • Igneous rocks: rocks formed when magma or lava cools and hardens. Igneous is from Latin, meaning “born of fire”. http://www.absorblearning.com/media/attachment.action?quick=12z&att=2795

    7. Lava is found on the surface, magma is found underground.

    8. Igneous rocks • Intrusive: forms below the surface when magma cools slowly. • It has large crystals (granite). http://www.1000granitecolors.com/

    9. Igneous rocks • Extrusive: formed when lava cools quickly on the surface of the Earth. • Crystals are small (obsidian and basalt)

    10. Igneous-examples and uses • Granite: buildings, bridges, and counters • Basalt : gravel • Obsidian: knives

    11. Famous Igneous Rocks Giants Causeway Stonehenge Sugarloaf Mtn. Easter Island

    12. The black stone Mt. Rushmore Mt. Fuji Machu Picchu

    13. Sedimentary Rocks(said-ah-men-tarry)

    14. Sedimentary rocks • Sediments: loose materials, such as rock fragments, mineral grains, and the remains of once living organisms • Sediments are moved by wind, water, ice, or gravity.

    15. Sedimentary rocks • Sedimentary: rock formed when sediments are compacted and cemented together. Rock may feel grainy or sandy and weak.

    16. Sedimentary rocks • Many fossils are found in sedimentary rocks.

    17. Sedimentary-examples and uses • Sandstone: building materials • Limestone: used to make cement

    18. Famous Sedimentary Rocks Monument Valley Angkor Wat Uluru (Ayers Rock) Chichen Itza Sphinx Haolong Bay

    19. Metamorphic Rocks(met-ah-more-fic)

    20. Metamorphic rocks • Metamorphic: rock that forms when heat, pressure, or chemicals act on a rock to change its form or composition. Layers are often seen in these rocks. Limestone into marble http://www.classzone.com/books/earth_science/terc/content/visualizations/es0607/es0607page01.cfm?chapter_no=visualization Granite into Gneiss

    21. Metamorphic rocks • Pressure and heat squish the rock into interesting patterns

    22. Metamorphic-example and uses • Marble: buildings and sculptures • Slate: flooring, roofing, walkways, and chalkboards

    23. Famous Metamorphic Rocks Parthenon Trevi Fountain Taj Mahal

    24. Review • What is the difference between a mineral and a rock? • Minerals have specific chemical compositions, rocks are a random assortment of materials • Rocks can have organic materials (shells and plants) mixed in • Rocks may not have a crystal structure VS.

    25. What are the three types of rocks? • Igneous • Sedimentary • Metamorphic

    26. Rock Cycle

    27. Rock Cycle • Rock cycle: a model that describes how rocks slowly change from one rock type to another rock type over time.

    28. Rock Cycle

    29. Rock Cycle • Changes to rocks occur due to melting, cooling, weathering and erosion, compaction and cementation, and heat and pressure.

    30. Rock Cycle Quiz • How does one rock change into another? Use your rock cycle chart to figure it out!

    31. 1. Igneous to sediments? • Weathering and erosion • Is there another path that could occur?

    32. 2. Sedimentary rock to Metamorphic? • Heat and pressure

    33. 3. Igneous Rock to Magma? • Melting

    34. 4. Igneous Rock to Metamorphic? • Heat and pressure

    35. 5. Igneous Rock to Sedimentary Rock? • Weather and erode into sediments • Sediments compact and cement into sedimentary rock.

    36. 6. Metamorphic Rock into Sedimentary Rock? • Weather and erode into sediments • Sediments compact and cement into sedimentary rock.

    37. 7. Sedimentary Rock to Igneous Rock? • Sedimentary rock undergoes heat and pressure to become Metamorphic rock, then it melts to become magma, then cools to become Igneous rock. OR • Sedimentary rock melts into magma then cools into Igneous rock

    38. The End of Rocks! http://www.youtube.com/watch?v=53lMdHzvGCQ

    39. Famous Rocks around the World • http://academic.brooklyn.cuny.edu/geology/grocha/monument/rocks.html