The Earth and Earth materials, as we know them today, have developed over long periods of time, through constant change processes.
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Explain how soil is formed from combinations of weathered rock and decomposed plant and animal remains, and that it contains living organisms.
Identify the components of soil and other factors, such as bacteria, fungi and worms, which influence its texture, fertility, and resistance to erosion.
Describe the properties of soil, such as color, texture, capacity to retain water, and its ability to support plant life.