Soil Assessment Noel Pd 2

40 Questions | Total Attempts: 37

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Soil Assessment Noel Pd 2

Questions and Answers
  • 1. 
    Soil is a mixture of weathered rock, mineral fragments, water, air and _____.
    • A. 

      Sand

    • B. 

      Decayed organic matter

    • C. 

      Moss

    • D. 

      Clay

  • 2. 
    The layer of soil that contains the most organic material is called the _____ horizon.
    • A. 

      A

    • B. 

      B

    • C. 

      C

  • 3. 
    All of the following cause mechanical weathering EXCEPT _____.
    • A. 

      Ice

    • B. 

      Tree roots

    • C. 

      Burrowing animals

    • D. 

      Carbonic acid

  • 4. 
    Litter often covers the _____ horizon.
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      All of the above

  • 5. 
    Chemical weathering is more rapid in a _____ climate.
    • A. 

      Warm, dry

    • B. 

      Warm, wet

    • C. 

      Cold, dry

    • D. 

      Cold, wet

  • 6. 
    Mechanical weathering is more rapid in a _____ climate.
    • A. 

      Dry

    • B. 

      Hot

    • C. 

      Cold

    • D. 

      Humid

  • 7. 
    Soil erosion can be slowed by _____.
    • A. 

      No-till farming

    • B. 

      Cutting trees from the middle of fields

    • C. 

      Plowing at least three times a year

    • D. 

      Farming on steeper slopes

  • 8. 
    The organic matter in humus is made of _____.
    • A. 

      Dead/decaying animals and insects

    • B. 

      Leaves

    • C. 

      Sticks/branches

    • D. 

      All of the above

  • 9. 
    The rate of weathering depends upon the area's _____.
    • A. 

      Oxygen

    • B. 

      Climate

    • C. 

      Water

    • D. 

      Soil

  • 10. 
    The rock and mineral fragments in soil come from rock that has been _____.
    • A. 

      Blasted

    • B. 

      Carved

    • C. 

      Weathered

    • D. 

      Chemically treated

  • 11. 
    On steep slopes and mountains, __________________ helps reduce erosion by creating level topped areas so crops can be grown.
    • A. 

      A shelter belt

    • B. 

      Strip cropping

    • C. 

      Mulching

    • D. 

      Terracing

  • 12. 
    Soils in _________ contain little organic material are are thinner making it very hard to grow crops.
    • A. 

      Tropical areas

    • B. 

      Deserts

    • C. 

      Prairies

    • D. 

      Temperate forests

  • 13. 
    Plants cannot grow without _____.
    • A. 

      Rocks

    • B. 

      Soil

    • C. 

      Moss

    • D. 

      Pesticides

  • 14. 
    __________ regions are especially vulnerable to erosion because once cleared, there is very little ground cover.  
    • A. 

      Desert

    • B. 

      Tropical

    • C. 

      Mountain

    • D. 

      Prairie

  • 15. 
    The mass of clay, silt, sand, and boulders that covers much of the United States was deposited by _____.
    • A. 

      Farming

    • B. 

      Glaciers

    • C. 

      Ice wedging

    • D. 

      Huge bulldozers

  • 16. 
    Ice wedging is brought about by _____.
    • A. 

      Carbonic acid freezing on rocks

    • B. 

      Water and oxygen reacting

    • C. 

      Water freezing and thawing

    • D. 

      Rocks colliding with each other

  • 17. 
    Minerals found in the B horizon were dissolved in water and carried there by a process called _____.
    • A. 

      Oxidation

    • B. 

      Leaching

    • C. 

      Weathering

    • D. 

      Littering

  • 18. 
    Oxidation occurs when some materials are exposed to  _________. 
    • A. 

      Oxygen and water

    • B. 

      Carbonic acid

    • C. 

      Kaolinite

    • D. 

      All of the above

  • 19. 
    The B horizon is _____.
    • A. 

      Rockier than the C horizon

    • B. 

      Richer in humus than the A horizon

    • C. 

      Lighter in color than the A horizon

    • D. 

      Thinner than the C horizon

  • 20. 
    Plants don't grow as well when _____ has been lost.
    • A. 

      Clay

    • B. 

      Topsoil

    • C. 

      Parent rock

    • D. 

      Slope

  • 21. 
    _____ is a factor that affects soil development.
    • A. 

      Time

    • B. 

      Slope

    • C. 

      Type of rock

    • D. 

      All of the above

  • 22. 
    The _____ horizon has smaller rock and mineral particles than the other layers.
    • A. 

      A

    • B. 

      B

    • C. 

      C

  • 23. 
    Below the C horizon is _____.
    • A. 

      Topsil

    • B. 

      Rock (parent material)

    • C. 

      Clay

    • D. 

      Humus

  • 24. 
    Mechanical weathering _____.
    • A. 

      Breaks apart rocks by physical processes

    • B. 

      Occurs when chemical reactions dissolve of change the minerals in rocks

    • C. 

      Occurs when iron is exposed to oxygen and water

    • D. 

      None of the above

  • 25. 
    Chemical weathering _____.
    • A. 

      Is caused by freezing and thawing

    • B. 

      Breaks apart rocks by physical processes

    • C. 

      Occurs when chemical reactions dissolve or change the minerals in rocks

    • D. 

      None of the above

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