Weathering and Erosion Review https://www.youtube.com/watch?v=HjVSiuj7L xk
Weathering What is weathering? It produces: 1.SEDIMENT 2.MUD 3.SAND 4.SILT
OF WEATHERING Mechanical weathering- changes only the size of rock WHAT ARE SOME EXAMPLES?
CHEMICAL WEATHERING Changes rock into a new substance by interacting with air or water Examples? Acid Rain, stalagmites and stalactites in a cave
BUILDING SOIL WEATHERING AND EROSION FORM SOIL BY BREAKING UP ROCK.
Soil: One of our most precious resources What happens when we lose our soil? https://www.youtube.com/watch?v=KUZyd35mCZc
HUMUS- the amount of organic material in soil The more humus, the more fertile the soil.
SOIL FACTORS PARENT MATERIAL- the composition of the original rock RELIEF- steeper slopes do not produce soil as quickly ORGANISMS- amount of nutrients from small plants and animals in the soil CLIMATE- soils from wet, dry, cold, and hot regions are different TIME- It takes 100 years to produce 2.5 CUBIC CENTIMETERS of soil (about the size of your fingertip)
Lessons from the Dust Bowl https://www.youtube.com/watch?v=o7Uwg8BT6qQ The Ogalalla Aquifer https://www.youtube.com/watch?v=XXFsS94HF08