Transcript
ROCKS AND WEATHERING
Rocks
composed of minerals natural occurring and have a chemical
formula○ ex. quartz is SiO2
rock cycleprocesses where rock changes from one form to
another○ igneous, sedimentary, and metamorphic
igneous- molten rock cools and solidifies
sedimentary- sediments are compacted and converted to rock by the process of lithification.
metamorphic- existing rocks changed by heat and pressure
Weathering and Erosion - breaking rocks apart
Physical (mechanical) weatheringglaciers moving, water (ice) expanding, wind, and
plant rootserosion: wind and water can loosen and move
sedimentdeposition: the sediment then builds up
somewhere else Chemical weathering
O, H2O, and CO2 chemically react with many minerals forming new compounds