• Soil can be defined as the organic and inorganic materials on the surface of the Earth that provides the medium for plant growth.
  • Inorganic materials, or those materials that are not living, include weathered rocks and minerals.
  • Weathering is the mechanical or chemical process by which rocks are broken down into smaller pieces.
  • As rocks are broken down, they mix with organic materials, which are those materials that originate from living organisms.
  • For example, plants and animals die and decompose, releasing nutrients back into the soil.

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