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Sixth Grade (Grade 6) Soil Questions

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Grade 6 Soil
Soil is composed mainly of what ingredients?
  1. water, air, sand, mud, shells
  2. worms, minerals, shells, air, rock pieces
  3. air, rock pieces, decayed organic matter, water, minerals
  4. rock pieces, mud, decayed organic matter, minerals, worms
Grade 6 Soil
What is soil made of?
  1. Air and water.
  2. Dead plants and animals.
  3. Weathered rocks and minerals.
  4. All of the above.
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 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 6 Soil
What is in subsoil?
  1. Humus and clay
  2. Bedrock and humus
  3. Silt, sand and clay
  4. Topsoil and water
Grade 6 Soil
Grade 6 Soil
Which of the following reduces erosive effects of soil in a rainy climate?
  1. Acidity of rain water
  2. Thick vegetation
  3. Burrowing animals
  4. Little vegetation
Grade 6 Soil
Soil is important because it provides
  1. housing for animals.
  2. nutrients for plants.
  3. storage for water.
  4. all of the above
Grade 6 Soil
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