Which of the following is not a physical process in Mechanical Weathering that breaks down rocks?

Cracks in a sidewalk caused by growing tree roots is an example of __________________________________.

Which of the following things do you find in soil?

_______________ is a mixture of weathered rock, decayed organic matter, mineral fragments, water, and air.

In the topsoil layer you can find _______________, a dark colored material made from decayed organic matter.

Soil is divided into _________________, or layers.

______________________ occurs when rocks are broken apart by physical processes.

All of the following are direct causes of mechanical weathering except:

The layer that contains the most humus and smaller rock pieces than the other layers is the ________ horizon.

Over thousands of years, _____________________ has chemically weathered limestone, forming caves.

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