4024403
Descripción
Test por Samantha Aitkens, actualizado hace más de 1 año
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Creado por Samantha Aitkens
hace alrededor de 9 años
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Pregunta 1
Pregunta
Soil formation begins with the weathering of
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litter
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bedrock
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the A horizon
Pregunta 2
Pregunta
Soil that is rich in humus has high
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fertility.
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Water content.
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sand content.
Pregunta 3
Pregunta
When earthworms add their wastes to the soil, then die and decay in the soil, they are contributing to the formation of
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silt.
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litter.
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humus.
Pregunta 4
Pregunta
Living organisms in soil help to
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slow the rate of soil formation.
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build up the C horizon.
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mix the soil and make humus.
Pregunta 5
Pregunta
Decomposers are the soil organisms that
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store moisture in the soil.
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break down and digest the remains of dead organisms.
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make spaces in the soil for air and water.
Pregunta 6
Pregunta
Soil is a valuable resource because it
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is important to all living things on land.
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contains sand and gravel.
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is rich in decomposers.
Pregunta 7
Pregunta
What can cause the loss of soil that is not protected by plant cover?
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chemical weathering
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erosion by water or wind
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mechanical weathering
Pregunta 8
Pregunta
Most of the work of mixing humus within the soil is done by
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fungi.
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ants.
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earthworms.
Pregunta 9
Pregunta
A permeable rock weathers easily because it
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is made up of small particles.
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contains many small, connected airspaces.
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is made up of only one mineral.
Pregunta 10
Pregunta
In which soil layer would you find loam that is rich in humus
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A horizon.
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B horizon.
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C horizon.
Pregunta 11
Pregunta
The texture, or particle size, of soil determines
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soil fertility.
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whether the soil is topsoil or subsoil.
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how much air and water the soil can hold.
Pregunta 12
Pregunta
The type of soil called loam is made up of
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pure humus.
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mostly clay.
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nearly equal amounts of silt, sand, and clay.
Pregunta 13
Pregunta
In a cross section of soil, the B horizon consists of
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clay, minerals, and little humus.
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humus only.
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partly weathered rock.
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