 Processes driven by earth’s interior heat are responsible for igneous and metamorphic  Weathering and erosion are powered by energy from sun to produce sedimentary

 Weathering makes sediments  Erosion and deposition move the sediments  Wind, water, ice, and gravity  Compaction and Cementation create ‘rocks’

 Frost wedging- ice expands and breaks rocks  Potholes in roads  Unloading- less pressure on upper layers cause it to expand faster and crack  Like a loaf of bread  Biological- expanding tree roots break rocks

 Water is THE agent  Mixed with oxygen can RUST iron-rich rocks  Mixed with CO 2 makes carbonic acid  Mixed with SO 2 makes acid rain

 Mechanical increases rate of Chemical weathering by breaking rocks into smaller pieces with increases surface area for reactions

 Amount of Freeze-Thaw  Type of vegetation  High temp & high moisture best for chemical weathering  Dry and cold have slower rate of weathering

 Made by weathering  mineral matter,Air, water, organic matter  Classified based on % of clay, sand, silt

 Glacier Sim Glacier Sim

 # 4, 5, and 5 on p 207  P  How does Erosion and dunes relate to your Project?