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how soil forms

TermDefinition
soil is loose weathered material on earth's surface in which plants can grow. It is a mixture of rock particles, minerals, decayed organic matter, water, and air.
bedrock is the solid layer of rock beneath the soil.
humus is a dark colored substance that forms when plants and animals decay.
geologists look at 3 things to identify the type of soil
soil fertility How well the soil supports plant growth
soil texture The feel and size of the particles in the soil
soil pH How much acid is in the soil
types of soil A. O Horizon: Made of organic material of plant and animal remains B. A Horizon: Made of topsoil C. B Horizon: Made of subsoil D. C Horizon: Made of bedrock that is beginning to weather and break apart E. Bedrock: Solid layer of rock
how humus is formed A. Decomposers: breaks up remains of dead plants and animals. B. Burrowers: Mix up the soil
Created by: user-2006762
 

 



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