We learned about coastal erosion from longshore currents. We learned two ways to reduce beach erosion. One way is a groin which is a structure that’s built at a right angle to a beach which traps sediment and reduces the effects of longshore currents. Another way is to create a retaining wall to help reduce erosion by waves. Next we learned that wind erosion carries sediment that cuts and polishes exposed rocks. Wind deposition results in dunes and loess. Next we looked at pictures of various types of erosion and determined whether it happened over a short or very long period of time. The sea arches and underwater caves took a very long time whereas the erosion of the soil or land happened very quickly. Then we played a new game called “Name the Rock” in which we were given a description or definition to determine whether it was igneous, sedimentary, or metamorphic rock.