We learned about what people can do to slow the changes to Earth’s landscape. We discovered how water erosion affects a hill. Then we explored the use of straw waddles to slow water erosion. We created an experiment to simulate the effect of straw waddles to slow the water erosion. We created a hill out of clay and straw waddles out of paper towels. We held the straw waddles down in the clay with toothpicks and used a paper cup with holes to simulate rain.