Track changes to the Sand-Landscape with toothpicks and drawings Alter the model to understand cause and effect of varying water flows on soil. PA Educational Standards Watershed Understand the role of the watershed. Identify and explain what determines the boundaries of a watershed. Explain how water enters a watershed. Explain factors that affected water quality and flow through a watershed.
Water Cycle Explain the water cycle.
Explain the water cycle as it relates to a watershed. Soil Erosion Discern earth features and processes. Groundwater flow and contaminant transport. Explain the earth's water properties, behavior and use.