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Soil Questions - All Grades

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Grade 5 Soil
The main ingredient in soil is                        .
  1. bacteria
  2. weathered rock
  3. decayed animal material
  4. decayed plant material
Grade 5 Soil
Which kind of soil has the most humus?
  1. red clay soil
  2. sandy pond soil
  3. dark forest soil
  4. bedrock
Grade 6 Soil
Humus is mainly made up of
  1. sand and silt.
  2. rocks.
  3. water.
  4. remains of plants and animals.
Grade 6 Soil
Which geologic process is most responsible for soil formation?
  1. erosion
  2. weathering
  3. cementation
  4. sedimentation
Grade 6 Soil
Why is humus an important part of soil?
  1. It contains nutrients, which feed the plants.
  2. It contains rocks, which strengthen the soil.
  3. It contains chemicals, which fight disease.
Grade 5 Soil
Which layer of soil contains the most humus?
  1. subsoil
  2. clay
  3. topsoil
  4. bedrock
Grade 6 Soil
Which type of soil contains humus?
  1. Bedrock
  2. Subsoil
  3. Topsoil
  4. All soils contain humus
Grade 6 Soil
What is the main thing that decomposers do for the soil?
  1. Store moisture
  2. Burrow deep in the soil
  3. Make space for air and water
  4. Break down and digest dead organisms
Grade 8 Soil
Which lists the soil particles from largest to smallest?
  1. sand, gravel, clay, silt
  2. gravel, silt, sand, clay
  3. gravel, sand, silt, clay
  4. gravel, clay, sand, silt
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