Scl #3 HW Sand Dunes

10 Questions | Total Attempts: 48

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Scl #3 HW Sand Dunes

SCL #3 Sand Dunes HW


Questions and Answers
  • 1. 
    Trees and shrubs on the back rows of dunes moderate the effects of:
    • A. 

      Wind and sun

    • B. 

      Ocean forces

    • C. 

      Salt spray

    • D. 

      Wind and water

  • 2. 
    Identify adaptations dune plants have to protect them from the intense heat and light of the sun.
    • A. 

      Dune plants: some have thick, waxy leaves, some that close curl inward and turn in a vertical position to reduce sun expose.

    • B. 

      Dune plants: can tolerate changes in salinity and can withstand different levels of salinity.

    • C. 

      Dune plants: are made up of brown and red marine leaft grasses that tolerate water, wind, and salt.

    • D. 

      Dune plants: are evergreen plants with thin, needle like leaves that can tolerate wind, water and salt.

  • 3. 
    Identify the three major forces that effects the row of dunes nearest the ocean:
    • A. 

      Strong winds, whipping sands, glaring sun.

    • B. 

      Strong winds, waves, and whipping sand.

    • C. 

      Strong waves, glaring sun and whipping sands.

  • 4. 
    Nitrogen is scarce on the dunes because:
    • A. 

      There is little or no decaying plant and animal material to enrich the dunes.

    • B. 

      There is too much Oxygen.

    • C. 

      There is too much Hydrogen and Oxygen.

    • D. 

      The organisms in a dune habitat consume more Nitrogen then they produce.

  • 5. 
    What provides the main source of nutrients on frontal dunes?
    • A. 

      Salt spray

    • B. 

      Oxygen

    • C. 

      Plant nitrogen

    • D. 

      Water (Hydrogen + Oxygen)

  • 6. 
    Why is Oxygen plentiful in the dune habitat?
    • A. 

      Ocean breezes provide steady in flow of wind.

    • B. 

      Dune plants provide Oxygen to the dune.

    • C. 

      Ocean spray provides Oxygen in the water that mists the dunes.

    • D. 

      All of these.

  • 7. 
    What do ghost crabs feed on?
    • A. 

      Ghost crabs feed on decaying plant and animal remains that accumulate at the tide lines.

    • B. 

      Ghost crabs feed on insects and small crabs found on the ocean beach.

    • C. 

      Ghost crabs feed on mole crabs and coquina's found at the shoreline.

    • D. 

      Ghost crabs feed on dune plants and detritus found on the ocean beach.

  • 8. 
    What is the effect of salt spray on back dune trees and shrubs?
    • A. 

      Salt spray from wind kills back the tips of the tree and shrub branches causing them to look sheard and grow stunted and twisted.

    • B. 

      Salt spray from wind nourishes the trees and shrubs causing their leaves to grow long and wide.

    • C. 

      Salt spray from wind prevents trees and shrubs from growing on the back dune.

    • D. 

      Dune plants: are evergreen plants with thin, needle like leaves. Salt spray from wind protects the trees and shrubs with a layer of salt covering it that can tolerate wind, water and salt.

  • 9. 
    What is the relationship between the height of a sand dune and the type of vegetation behind the frontal dune?
    • A. 

      The higher the dune the larger the vegetation behind it.

    • B. 

      The higher the dune the smaller the vegetation behind it.

    • C. 

      The dune height does not affect the vegetation behind it.

    • D. 

      The lower the dune the larger the vegetation behind it.

  • 10. 
    Where rows of dunes are protected from salt spray and beach forces by frontal dunes the community____________
    • A. 

      Where rows of dunes are protected from salt spray and beach forces by frontal dunes the community changes. There, dune thickets and maritime forest trees can survive.

    • B. 

      Where rows of dunes are protected from salt spray and beach forces by frontal dunes the community is unstable few plants grow.

    • C. 

      Where rows of dunes are protected from salt spray and beach forces by maritime forest the community is stable.

    • D. 

      Where rows of dunes are protected from salt spray and beach forces by the berm the community changes.

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