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Eighth Grade (Grade 8) Soil Questions

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Grade 8 Soil
Soil is a mixture of
  1. decayed organic matter and oxygen.
  2. weathered rock and water.
  3. mineral fragments.
  4. all answers are correct
Grade 8 Soil
Humus is formed as a result of
  1. decomposition.
  2. exfoliation.
  3. oxidation.
  4. weathering.
Grade 8 Soil
Which of the following best describes regolith?
  1. a soil that contains large amounts of iron oxide and aluminum-rich clays
  2. a mixture of mineral matter, organic matter, water, and air
  3. a large pile of rock fragments at the base of a steep cliff
  4. the layer of rock and mineral fragments that covers nearly all of Earth's land surface
Grade 8 Soil
Which of the following is NOT an important factor in soil formation?
  1. parent material
  2. time
  3. climate
  4. loam
  5. organisms
  6. slope
Grade 8 Soil
How is soil made?
  1. weathering
  2. infiltration
  3. transpiration
  4. erosion
Grade 8 Soil
Which of the following would most likely damage a soil's structure?
  1. a gentle rain
  2. organic matter
  3. earthworms
  4. compaction
Grade 8 Soil
In which horizon of a soil profile does leaching normally occur?
  1. Horizon A
  2. Horizon D
  3. Horizon B
  4. Horizon C
Grade 8 Soil
In which environment might soil be MORE acidic?
  1. a dry environment
  2. a humid environment
  3. an Arctic region
  4. a mountain range
Grade 8 Soil
What is an organic matter in soil?
  1. leaching
  2. horizon
  3. humus
  4. profile
Grade 8 Soil
What is the youngest layer?
  1. A
  2. B
  3. C
  4. D
  5. E
Grade 8 Soil
What is the oldest layer?
  1. A
  2. B
  3. C
  4. D
  5. E
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