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CAT-6 Earth Science “To Know” Words Landform: Physical features on Earth’s surface Weathering: Breaking bigger rocks in smaller pieces Erosion: Movement of sediments from one place to another Deposition: Dropping sediment in a new place Flood plains: Flat area where river deposits sediment Dune: Heaps of sand Glaciers: Thick sheet of ice formed in areas where more snow falls than melts Valley glacier: Formed in high mountains Continental glacier: Formed over large areas of land (ex. Greenland and Antarctica) Mass movement: Downward movement of rock and soil Mudslide Sudden movement Landslide Sudden movement Creep Slow movement Sinkhole: Large hole made in the ground where limestone gets weathered Oxbow Lake: Rivers loop as they flow, they follow the shortest route. Cut off loop is an Oxbow Lake. Rock: Material made up of one or more minerals Igneous rocks: Rocks that form when melted rock hardens Sedimentary rocks: Rocks that form from the layers of sediment as they are squeezed and stuck together Metamorphic rocks: Rocks whose form and looks are changed by high heat and great pressure Know how to identify common rock forming minerals, including: Quartz, Calcite (streak test), Feldspar, Mica (hardness), Hornblende