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The layer that contains the most humus and smaller rock pieces than the other layers is the ________ horizon.
Mechanical Weathering
humus
Acids in the air
Soil
All of the above
horizon
mechanical weathering
A
Cracks in a sidewalk caused by growing tree roots is an example of __________________________________.
Mechanical Weathering
humus
Acids in the air
Soil
All of the above
horizon
mechanical weathering
A
Which of the following is not a physical process in Mechanical Weathering that breaks down rocks?
Mechanical Weathering
humus
Acids in the air
Soil
All of the above
horizon
mechanical weathering
A
Soil is divided into _________________, or layers.
Mechanical Weathering
humus
Acids in the air
Soil
All of the above
horizon
mechanical weathering
A
______________________ occurs when rocks are broken apart by physical processes.
Mechanical Weathering
humus
Acids in the air
Soil
All of the above
horizon
mechanical weathering
A
_______________ is a mixture of weathered rock, decayed organic matter, mineral fragments, water, and air.
Mechanical Weathering
humus
Acids in the air
Soil
All of the above
horizon
mechanical weathering
A
In the topsoil layer you can find _______________, a dark colored material made from decayed organic matter.
Mechanical Weathering
humus
Acids in the air
Soil
All of the above
horizon
mechanical weathering
A
Which of the following things do you find in soil?
Mechanical Weathering
humus
Acids in the air
Soil
All of the above
horizon
mechanical weathering
A
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