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
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
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 • Sedimentary • Metamorphic
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
Igneous rocks • Intrusive: forms below the surface when magma cools slowly. • It has large crystals (granite). http://www.1000granitecolors.com/
Igneous rocks • Extrusive: formed when lava cools quickly on the surface of the Earth. • Crystals are small (obsidian and basalt)
Igneous-examples and uses • Granite: buildings, bridges, and counters • Basalt : gravel • Obsidian: knives
Famous Igneous Rocks Giants Causeway Stonehenge Sugarloaf Mtn. Easter Island
The black stone Mt. Rushmore Mt. Fuji Machu Picchu
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.
Sedimentary rocks • Sedimentary: rock formed when sediments are compacted and cemented together. Rock may feel grainy or sandy and weak.
Sedimentary rocks • Many fossils are found in sedimentary rocks.
Sedimentary-examples and uses • Sandstone: building materials • Limestone: used to make cement
Famous Sedimentary Rocks Monument Valley Angkor Wat Uluru (Ayers Rock) Chichen Itza Sphinx Haolong Bay
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
Metamorphic rocks • Pressure and heat squish the rock into interesting patterns
Metamorphic-example and uses • Marble: buildings and sculptures • Slate: flooring, roofing, walkways, and chalkboards
Famous Metamorphic Rocks Parthenon Trevi Fountain Taj Mahal
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.
What are the three types of rocks? • Igneous • Sedimentary • Metamorphic
Rock Cycle • Rock cycle: a model that describes how rocks slowly change from one rock type to another rock type over time.
Rock Cycle • Changes to rocks occur due to melting, cooling, weathering and erosion, compaction and cementation, and heat and pressure.
Rock Cycle Quiz • How does one rock change into another? Use your rock cycle chart to figure it out!
1. Igneous to sediments? • Weathering and erosion • Is there another path that could occur?
2. Sedimentary rock to Metamorphic? • Heat and pressure
3. Igneous Rock to Magma? • Melting
4. Igneous Rock to Metamorphic? • Heat and pressure
5. Igneous Rock to Sedimentary Rock? • Weather and erode into sediments • Sediments compact and cement into sedimentary rock.
6. Metamorphic Rock into Sedimentary Rock? • Weather and erode into sediments • Sediments compact and cement into sedimentary rock.
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
The End of Rocks! http://www.youtube.com/watch?v=53lMdHzvGCQ
Famous Rocks around the World • http://academic.brooklyn.cuny.edu/geology/grocha/monument/rocks.html