Final answer:
Soil is made up of both organic and inorganic material, including humus, rock particles of different sizes, and different soil types like sand, silt, clay, and loam.
Step-by-step explanation:
Soil is made up of both organic and inorganic material. The organic material, called humus, consists of microorganisms and dead animals and plants in various stages of decay. The inorganic material is made up of rock that is slowly broken down into different sized particles.
Soil particles that are 0.1 to 2 mm in diameter are called sand, particles between 0.002 and 0.1 mm are called silt, and particles smaller than 0.002 mm are called clay. Some soils contain a mixture of sand, silt, and humus and are called loams.