APES Unit 6

The makeup and movement of tectonic plates

Composed of the lithosphere and floats on the asthenosphere, due to mantle convection currents

Oceanic plate compisition

Basaltic (denser)

Continental plate compisition

Granitic (less dense)

Three aibitoic components of soil

Minerals (sand, silt, clay), water, air

Two biotic components of soil

Decomposers (bacteria & fungi), and plant roots.

Describe how weathering of parent materials impacts of soil formation.

Breaks down parent material into smaller particles, forming the mineral base.

Process of soil erosion

Transport of topsoil by natural forces (wind and water)

Compisition of A Horizon soil