Soil is a mixture of weathered rock and __________.

The layer of soil that contains the most humus and smaller rock and mineral particles that the other layers is the __________ horizon.

The organic material in humus includes __________.

Compared to the A horizon in a soil profile, the B horizon __________.

The difference between mechanical and chemical weathering is __________.

A process that wears away surface materials and moves them to a different location.

Mass movement when sediments slowly inch their way down a slope.

Wind erosion of loose sediments.

A mixture of different-sized sediments deposited by a glacier.

Deposits formed when windblown sediments settle and build up behind an obstacle.

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