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- 1. Multiple Choice
SOIL is one of the most valuable ___________ factors in an ecosystem.
biotic
abiotic
- 2. Multiple Choice
Everything that lives on land depends on the Soil Quality. Soil quality is a combination of ___ different factors
3
4
5
6
- 3. Multiple Choice
Everything that soil is made up of: rock particles (sand, silt, clay), humus (decayed organic matter), minerals, air, water.
Soil Composition
Soil Profile
Texture
Permeability
- 4. Fill in the Blank
What is another term used for the layers of the soil profile?
- 5. Multiple Choice
Top layer of a soil profile. Generally dark in color and nutrient rich, with a mixture of humus, clay, and minerals.most suitable for plant growth
Topsoil
Subsoil
Parent Material
Bedrock
- 6. Multiple Choice
The second layer in a soil profile. It is located directly beneath the topsoil.
Topsoil
Subsoil
Parent Material
Bedrock
- 7. Multiple Choice
The third layer in a soil profile. It contains the least amount of nutrients and is located directly above the bedrock.
Topsoil
Subsoil
Parent Material
Bedrock
- 8. Multiple Choice
Material that is at the base of a soil profile. This is larger rocks that will eventually be broken down into parent material.
Topsoil
Subsoil
Parent Material
Bedrock
- 9. Fill in the Blank
Another term for decayed organic matter. Found in the topsoil layer.
- 10. Multiple Choice
Particle size affects which TWO?
Soil Composition
Texture
Permeability
pH
- 11. Multiple Choice
Soil particles are classified by size. Which order is correct SMALLEST to LARGEST
gravel, sand, silt, clay
clay, silt, sand, gravel
sand, silt, gravel, clay
silt, gravel, clay, sand
- 12. Multiple Choice
A way to classify soil based on its feel and the relative proportions of sand, silt, and clay.
Texture
Permeability
pH
Particle Size
- 13. Fill in the Blank
A texture name made of about equal parts of sand and silt and clay
- 14. Fill in the Blank
What can help you determine soil texture name? (Pictured)
- 15. Multiple Choice
How freely water flows through the soil’s pore spaces (the open spaces between soil particles)
Texture
Permeability
pH
Particle Size
- 16. Multiple Choice
Which two have low permeability (water does NOT flow freely)?
clay
silt
sand
gravel
- 17. Multiple Choice
Which two have high permeability (water does flow freely)?
clay
silt
sand
gravel
- 18. Multiple Choice
How acidic or basic a soil is
Texture
Permeability
pH
Particle Size
- 19. Multiple Choice
Most plants grow best in soils with a pH of...
1-14
4-10
5-7
- 20. Fill in the Blank
A fertilizer alters pH in order to make the soil nutrients more accesible
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