How is soil formed ?
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Parent materials
Soil minerals form the basis of soil. They are produced from rocks (parent material) through the processes of weathering and natural erosion. Water, wind, temperature change, gravity, chemical interaction, living organisms and pressure differences all help break down parent material.
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Variation in temperature between day and night led to repeated expansion of rocks during the day and contraction, on...
Water entered the cracks and crevices (cavities) of the rocks. In winter, water froze into ice and expanded. It...
The roots of small plants grew and entered the cracks and enhanced the process of break down.
Many microorganisms and lichens grew on the surface of rocks. They produced acids which dissolved the minerals and...
Due to rain and wind, broken pieces.
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