2. Rocks ccomposed of minerals natural occurring and have a chemical formula ○e○ex. quartz is SiO 2 rrock cycle processes where rock changes from one form to another ○i○igneous, sedimentary, and metamorphic

3. igneous -m-molten rock cools and solidifies

4. sedimentary -s-sediments are compacted and converted to rock by the process of lithification.

5. metamorphic -e-existing rocks changed by heat and pressure

7. Weathering and Erosion - breaking rocks apart PPhysical (mechanical) weathering glaciers moving, water (ice) expanding, wind, and plant roots erosion: wind and water can loosen and move sediment deposition: the sediment then builds up somewhere else CChemical weathering O, H 2 O, and CO 2 chemically react with many minerals forming new compounds