|Name of Activity||Rock Types|
|Keywords||1 Hour Total, demo, rock, sedimentary, igneous, metamorphic|
|Grade Level||K, 1, 2, 3, 4, 5, 6|
|Time||1 Hour Total|
|Brief Description||Students will watch three demos that show how each main type of rock is formed (sedimentary, igneous, and metamorphic).|
|Lesson Objectives:||To classify and distinguish between three main types of rocks.|
|Necessary Background||There are three different types of rocks: sedimentary, igneous, metamorphic. Sedimentary rock is formed out of soil, silt, sand, seashells, and other pieces. The tiny bits settle and build up in thick layers. Minerals from water seep into the spaces between the particles and bond them into solid rock. The Grand Canyon is made up of sandstone, limestone, and shale which are all sedimentary rocks. Igneous rock was once hot liquid inside the earth. Rock that erupted from volcanoes and cooled on the surface is called extrusive igneous rock. Igneous rock that cooled more slowly inside the Earth is called intrusive. Apache Tear and the Hawaiian Islands are mainly igneous rock. Metamorphic rock is igneous or sedimentary rock that is changed by heat, pressure or both. The Appalachian Mountains including the Blue Ridge are mainly metamorphic rock with a little igneous rock.