Rocks and Minerals Study Guide Test on: Students will need to know these vocabulary words and examples of the types of rocks Mineral: Natural, nonliving solid crystals that make up rocks Weathering: The wearing away of large rocks into smaller rocks Erosion: Movement of the broken pieces of rock away from the site of weathering Sediment: Small pieces of rock and mineral which gets laid down in layers Compaction: Water squeezed out of the layers of sediment Cementation: The formation of new crystals which glues sediment layers together Magma: melted rock which is still underground Extrusive Igneous Rock: Rock that forms from molten (melted) rock which cools outside of a volcano (quickly) Examples of Extrusive Igneous Rock: obsidian and basalt Intrusive Igneous Rock: Rock that forms from molten (melted) rock which cools underground (slowly) Examples of Intrusive Igneous Rock: granite Sedimentary Rock: Rock that is formed when sediments are cemented together and harden; fossils may be found in this type of rock Examples of Sedimentary Rock: Limestone and sandstone Metamorphic Rock: Rock that is formed as a result of heat and pressure Examples of Metamorphic Rock: slate and marble Students will need to be able to label a blank diagram of the rock cycle with the correct terms Students will need to write a paragraph explaining the path of a rock as it moves through all the stages of the rock cycle – their rock cycle projects should help with this! (only one of the igneous rock types needs to be included in the explanation)