Do Now 1.______dark layer of the soil profile that contains the most humus (soil profile) 2.______type of chemical weathering reacts with oxygen to form rust (weathering 2) 3.______ layer of soil that is made of clay and minerals and contains less humus (soil profile) 4.______ type of weathering occurs when water reacts with minerals in rocks (weathering 2) 5. ______ decayed plant and animal mattter in the soil (soil or soil profile) How do rock layers become disturbed? What are the features that can cut across rock layers? What is a fault? What is an intrusion? What is folding? What is tilting? 1. How do rock layers become disturbed? 1. Rock layers become disturbed from forces inside the Earth 2. What are the features that can cut across rock layers? 2. The features are faults, intrusions, tilting, and folding 3. What is a fault? 3. Fault-Break in the Earths crust and the layers can slide 4. What is an intrusion? 4. Intrusion-molten rock from Earths interior that squeezes into existing rock and cools What type of rock do you think forms once an intrusion is cooled? 5. What is folding? 5. Folding-rock layers bend and buckle 6. What is tilting? 6. Titling-slanting rock layers