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Mechanical weathering This process occurs when physical forces break rocks into smaller pieces Frost wedging Liquid water freezes inside crevices in rocks breaking them apart Biological activity Activities of living things such as plants are an example of this type of weathering Chemical weathering This involves the transformation of rock into one or more new compounds Soil ________ is the part of the regolith that can support plant growth Mineral , organic matter, water and air List the four major components of the the above part of regolith Soil texture This refers to relative proportions of the different size particles in soil The longer the soil sits the thicker How does time affect soil formation Climate Which of these factors has the greatest affect Warm and Moist What type of climate produces thick soil The break down the soil How do organisms help soil formation Top soil The O and A horizons together make up the _______ Construction , Deforestation How do human activities increase soil erosion? Water , removal of vegetation , over steepening What can cause the above to happen ? Rock fall Occurs when rocks or fragments fall freely through the air Rock-slide A block of material suddenly along a flat, inclined surface Slump Downward movement of earth along a curved surface Debris flow Mass movements containing large amounts of water