_______________ is also known as physical weathering.

__________ is a destructive process.

__________ is when, along with sheet erosion, running water makes thin finger shaped channels called rills and washes away the soil.

________ is the thin layer of rotting organic matter that covers the soil.

_________ is when soil is washed away by deep cut into hillsides by rain water.

_______ is further accelerated by the process of deforestation and overgrazing.

The vertcal section of the soil is called the ___________.

Weathering assists __________.

_________ is also known as subsoil.

The layers or horizons of soil are determined by ___________.