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Soils (Grade 9)

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Soils

1. 
Soil Layers Without Text Labels
Select the letter from the soil profile diagram that best matches each statement.

           A-horizon

           R-horizon

           B-horizon

           O-horizon

           C-horizon

           Rock fragments

           Subsoil

           Humus

           Bedrock

           Topsoil
2. 
What is the chief threat to soil?
  1. erosion
  2. pests
  3. destructive plant life
  4. decay
3. 
Soils formed at high latitudes and high elevations that have good drainage but no distinct horizons are classified as                .
  1. desert soils
  2. temperate soils
  3. tropical soils
  4. polar soils
4. 
                is any one of various types of soil that can support a forest, grassland, or prairie.
  1. Desert soil
  2. Temperate soil
  3. Tropical soil
  4. Polar soil
5. 
When a soil is impermeable, it
  1. allows water to flow freely through it
  2. has no water in it at all
  3. does not allow water to pass through it
  4. has large pore spaces
6. 
Identify and discuss three factors that influence soil formation.







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