1. Weathering This is a slide show by Brecken.

2. Weathering Weathering is the breaking down of rocks. 3. Chemical Weathering Chemical weathering happens when a rock breaks down and the minerals change. 4. Abrasion Abrasion is the sharp part of sand that changes rocks. 5. Physical Weathering Physical weathering is when stuff like rain breaks stuff down 6. Humus (Hue-mus) Humus is decayed plant an animal material 7. Horizon A horizon B horizon C horizon Horizons are layers of soil 8. Exfoliation When Exfoliation happenslayers of rock peel off like an onion 9.