WEATHERING AND SOIL FORMATION
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WEATHERING AND SOIL FORMATION. Weathering (pg 115) – the process by which natural forces break down rocks Mechanical weathering (pg 116) – the breaking up of rocks by physical forces without changing their composition

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WEATHERING AND SOIL FORMATION

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Weathering and soil formation

WEATHERING AND SOIL FORMATION


Weathering and soil formation

Weathering (pg 115) – the process by which natural forces break down rocks

Mechanical weathering (pg 116) – the breaking up of rocks by physical forces without changing their composition

Exfoliation (pg 116) – a process in which layers or sheets of rock gradually break off

Abrasion (pg 116) – is the process of wearing something down by friction

Chemical weathering (pg 118) – the breakdown of rocks by chemical reactions (Due to exposure to air or water) that change the rocks’ makeup, or composition


Weathering and soil formation

Humus (pg 123) – the decayed organic matter in soil

Soil horizon (pg 124) – a layer of soil with properties that differ from those of the layer above or below it

Soil profile (pg 124) – all of the soil horizons in a specific location (cross section of soil layers displaying all horizons)

Desertification (pg 133) – the expansion of desert conditions in areas where the natural plant cover has been destroyed


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