What is soil?
a combination of mineral and organic matter; water, and air. that portion of the regolith that supports plant growth.
the rock/mineral layer that is loosly sitting on earths surface
mineral matter or broken down rock
organic matter or humus (decayed remains..)
clay, silt, sand
Soil formation: steps
parent material, time, climate, organisms, and slope
the source of the mineral matter in soil
How are parent materials moved?
by gravity, water, wind and ice
Triggers of mass movements?
saturation of water, over steepening, loss of vegatation, and earthquakes
What are mass movements?
the transfer of rock and soil downslope due to gravity
What is a tributary?
a stream that empties into another stream