Topic or Theme: Igneous Rocks Grade Level: Third Grade Time Required: Time For Preparation: 30 minutes Time For Activity: 45 minutes on one day Objectives: Ohio Academic Content Standard 1 Compare distinct properties of rocks (e.g., color, layering, and texture) Ohio Academic Content Benchmark C Describe Earth s resources including rocks, soil, water, air, animals and plants and the ways in which they can be conserved NSTA Standards: Properties of Earth Materials 1. Earth materials are solid rocks and soils, water, and the gases of the atmosphere. 2. The varied materials have different physical and chemical properties. 3. Earth materials provide many of the resources that humans use. Materials: Minimum of 20 crayons, depending upon how much igneous rock you want to make for each group of students (melted and cooled prior to class) Aluminum paper, one 8 x11 piece for each table Plastic knives Igneous Rock sheet for each student Piece of Obsidian Piece of Pumice Other igneous rocks Pictures of igneous rocks Identifying Rocks by Nancy Kelly Allen Geology Rocks! Igneous Rocks by Rebecca Faulkner Activity: 1) Watch video on You Tube about the Crayon Rock Cycle (http://www.youtube.com/watch?v=wptgvgcmi90&feature=related ) 1) Review metamorphic rock lesson from day before. What type of rock did we talk about yesterday? (metamorphic) How do metamorphic rocks form? (heat and pressure) Do they melt all the way? (no) 2) Show students picture of volcano from previous lesson on metamorphic rocks. Does anyone remember what this is? We talked about this yesterday. (volcano, lava) Is this a rock? (no) However, once it hardens it forms into a rock. We call that type of rock igneous rocks. Igneous rocks
are rocks that were once melted but have cooled and hardened. To make chocolate covered strawberries, bakers melt fudge, then dip the strawberry in it. When the fudge cools, it hardens. Once a rock has been melted all the way and then hardens it forms igneous rocks. 3) Show students picture of granite (Allen, page 10). This is granite, a type of igneous rock. Do you know what we use granite for? (kitchen countertops) Granite has grains in them which make them very pretty and many people like to use them in their kitchen. Show studnets picture of pumice (Allen, page 12). This is another type of igneous rock called pumice. Does this look smooth or rough? (rough) It is rough. It forms from lava that has hardened. It is rough because there is air that gets tramped in the rock from the lava cooling so quickly. Pumice also floats in water. Pumice is also sometimes used in bathtubs. It is also used as a household cleaning agent. Because it is light, it is often used in concrete for sidewalks and buildings. Show students picture of obsidian (Allen, page 20). Obsidian is often found in jewelry. It is often very dark and looks very glassy. It is usually very shiny. In the past it was used for arrowheads and other weapons. 4) Give each group a sample of the igneous crayon rock created prior to class. Instruct students to draw what the outside of their crayon rock looks like. Any students waiting to have their crayon rock cut open can work on the front page of the worksheet using rock books provided. 5) Once students have drawn their rock, instruct each group to bring you their rock to cut open. While you are helping each group cut their crayon rock open, other students should be working on the other sections of their worksheet. Make sure students know where to find pictures of igneous rocks within the classroom. 6) After cutting each groups crayon rock open, students should draw anything that they see on their worksheet. 7) Review with students at the end of the lesson. Is lava is an igneous rock. (No) What happens to lava when it cools? (Forms igneous rock) Evaluation:. Give each student the igneous rock worksheet to complete either in class or as homework. If there are any incorrect answers or misconceptions, revisit the concepts of igneous to clarifying any confusion. Assessment will continue throughout the rock unit with other lesson plans as you build on this lesson with sedimentary rock.
Reflection:. Multimedia Resources: Burrows, Charles. Scheme For Igneous Rock Identification. Accessed on 13 March 2012. http://www.eram.k12.ny.us/education/components/docmgr/default.php? sectiondetailid=17500&fileitem=614&catfilter=444 Caputo, Lorraine. Igneous Rocks. Accessed on 13 March 2012. http://www.wiziq.com/tutorial/513-igneous-rocks Reynolds, Ben. Rock Hound Layers. Accessed on 13 March 2012. http://www.fi.edu/fellows/fellow1/oct98/puzzles/layers/layer1.htm References: Allen, Nancy Kelly. Identifying Rocks. New York: The Rosen Publishing Group, 2009. Anderson, Alan; Diehn, Gwen; Krautwurst, Terry. Geology Crafts For Kids: 50 Nifty Projects to Explore the Marvels of Planet Earth. Sterling, 1998. Bjornerud, Marcia. Reading the Rocks: The Autobiography of the Earth. Cambridge: Westview Press, 2008. Brown, Cynthia Light; Brown, Nick. Explore Rocks and Minerals: 25 Great Projects, Activities, Experiments. Chicago: Nomad Press, 2010. Cefrey, Holly. Igneous Rocks. Power Kids Press, 2003. Chesterman, Charles Wesley. National Audobon Society: Field Guide to North American Rocks and Minerals. Alfred A Knopf Inc, 1979. Christian, Peggy. If You Find a Rock. Orlando: Harcourt, 2000. Cvancara, Alan M.. A Field Manuel for the Amateur Geologist: Tools and Activities for Exploring Our Planet. Canada: Jossey-Bass, 1995. Dayton, Connor. Rock Formations. Power Kids Press. 2007. Farndon, John. EGuides: Rock and Mineral. New York: DK Publishing, Inc. 2005. Gallant, Roy A. Rocks. New York: Benchmark Books, 2000. Gans, Roma; Keller, Holly. Let s Go Rock Collecting. New York: Harper Collins, 1997.
Gardner, Robert. Smashing Science Projects about Rocks and Minerals. Enslow Elementary, 2007. Merali, Zeeya; Skinner, Brian J.. Visualizing Earth Science. Hoboken, New Jersey: John Wiley & Sons, Inc., 2009. Pages 64-71. O Malley, Christina E. Lecture Notes from January 19, 2012. Pough, Frederick H.. A Field Guide to Rocks and Minerals. Houghton Mifflin Harcourt, 1998. Mrs. Gillespie s Notes Aggregates rocks are collections of mineral particles (and sometimes other types of particles such as organic debris or bits of volcanic glass) stuck together, or intergrown to make a coherent mass Mineral assemblages types and relative proportions of minerals that constitute rock Textures overall appearance of rock because of size, shape, and arrangement of mineral grains Rock cycle set of crustal processes that form new rock, modify it, transport it, and break it down Weathering chemical and physical breakdown of rock exposed to air, moisture, and living organisms 3 great cycles of Earth system 1) Rock cycle 2) Hydrologic cycle 3) Tectonic cycle Erosion wearing away of bedrock and transport of loosened particles by fluid, such as water Igneous rocks rocks that form by cooling and solidification of molten rock Magma molten rock Volcanic rock igneous rock formed from lava also called extrusive igneous rocks
plutonic rock igneous rock formed underground from magma also called intrusive igneous rocks aphanitic rocks with very fine-grained texture porphyritic consist of large mineral rains embedded in aphanitic matrix pegmatite coarse-grained plutonic rock with mineral grains larger than 2 cm in diameter felsic word formed from feldspar and silica feldspar and quartz are most common minerals found in them
Name Date Draw a picture of an igneous rock. Fact #1 Fact #2 Uses of Igneous Rocks
Summarize how igneous rocks are formed: Outside of my igneous wax rock Inside of my igneous wax rock