Weathering and Soil

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Living organisms in soil help to

Soil that is rich in humus has high

The type of soil called loam is made up of

The most important factors in determining the rate of weathering are

The agent of mechanical weathering in which rock is worn away by the action of other rock particles is called

A marble statue is left exposed to the weather. Within a few years, the details on the statue have begun to weather away. This weathering probably is caused by

Most of the work of mixing humus within the soil is done by

A permeable rock weathers easily because it