Unit 6 Vocabulary (part 2) 1. Erosion-when wind and water move soil and sediment from one place to another 2. Weathering-the breakdown of rocks into smaller pieces, can be physical or chemical. 3. Deposition- the process by which water, ice, wind and gravity deposit eroded sediments in new locations 4. Eco Region –an area defined by its environmental conditions such as climate, landforms and soil characteristics 5. Pollution-The contaminated air, water, or soil by substances that are harmful to living organisms 6. Water shed- the area of land where all of the water that is under it or drains off of it goes into the same place 7. Aquifer-an underground layer of permeable rock (gravel, sand, silt, or clay) from which groundwater can be usefully extracted using water well. 8. Groundwater-Water beneath the earth's surface, often between soil and rock that supply wells and springs. 9. Permeability- the ability of fluids to flow through rock 10. Percolation-The downward movement of water through layers of soil or rock 11. Porosity- The amount of open space between particles that will affect the movement of water.