1. Soils

2. Bell Ringer How does temperature effect chemical weathering?
What type of weathering involves changes in the size or shape of the rock?
What is the reaction of water with other substances called?

3. Soils

4. Soil
SOIL: The loose covering of rock particles and decaying organic matter(humus)
It is a result from both physical and chemical weathering

5. Parent Material Defined: The source of the mineral matter in soils
Parent material is important because:
It affects the rate of weathering
Chemical makeup affects the soils fertility

6. Time The longer a soil has been forming the thicker it is.
As a soil gets older other characteristics affect the soil more than the parent material

7. Climate Climate has the greatest affect on soil formation
Variations in temperature and precipitation affect the rate, depth and type of weathering

8. Organisms Plants are the main source of organic matter
Plants release nutrients when they decay. Adds to the soils fertility

9. Slope Steep slopes have higher erosion. Little water can soak in.
Soils are thin on steep slopes

10. Soil texture
Soils are composed of particles that can be sand, silt or clay sized.
Based on the soils % composition of each type of particle that determines the soils texture

11. Soil profile A soil profile is the vertical sequence of soil layers
Soil horizons are the distinct layers in a profile
The upper layers contain more organic material, the bottom layers contain more parent material