8th Grade 2018 End Of Coastal Unit Exam

97 Questions | Total Attempts: 66

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8th Grade 2018 End Of Coastal Unit Exam

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Questions and Answers
  • 1. 
    Substrate is:
    • A. 

      Bottom material ocean organisms live in or on.

    • B. 

      Bottom material found in the ocean.

    • C. 

      Bottom material organisms live in or on.

    • D. 

      Subtidal nutrients

  • 2. 
    Match the location where the intertidal zone is found.
    • A. 

      Between the high and low tide lines

    • B. 

      Above the high tide line

    • C. 

      Below the high tide line

    • D. 

      Between the sand bar and the berm

    • E. 

      Between the swash zone (shoreface where waves break) and the dune

  • 3. 
    Match the location where the subtidal zone is found.
    • A. 

      Between the high and low tide lines

    • B. 

      Above the high tide line

    • C. 

      Below the water line

    • D. 

      Between the sand bar and the berm

    • E. 

      Between the swash zone (shoreface where waves break) and the dune

  • 4. 
    The kind of sediment deposited in shoreline habitats depends on:
    • A. 

      Estuary deposits

    • B. 

      Tidal amplitude

    • C. 

      Water turbulence

    • D. 

      Coastal plain migration

  • 5. 
    What is a berm and where is it found?
    • A. 

      The back dune end of the supratidal zone

    • B. 

      The movement of sand offshore during a storm

    • C. 

      The supratidal ledge of sand at the high tide line

    • D. 

      The edge of the swash (shoreface where waves break) zone

  • 6. 
    What is the average salinity of the ocean?
    • A. 

      35 ppt

    • B. 

      55 ppt

    • C. 

      15 ppt

    • D. 

      25 ppt

  • 7. 
    What kind of sediment settle in the sound?
    • A. 

      Fine silt

    • B. 

      Loam

    • C. 

      Coarse sand

    • D. 

      Clay

  • 8. 
    What kind of sediments settle on the ocean beach?
    • A. 

      Silt

    • B. 

      Gravel

    • C. 

      Coarse sand

    • D. 

      Clay

  • 9. 
    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

  • 10. 
    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.

  • 11. 
    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.

  • 12. 
    What provides the main source of nutrients on frontal dunes?
    • A. 

      Salt spray

    • B. 

      Oxygen

    • C. 

      Plant nitrogen

    • D. 

      Water (Hydrogen + Oxygen)

  • 13. 
    Why are dunes made of finer sand than the beaches?
    • A. 

      Waves deposit the fine sand on to the dune.

    • B. 

      Saltation carries only the finest of beach sand.

    • C. 

      Saltation mixes salt with sand making it more fine.

    • D. 

      Fine sand is more porous

  • 14. 
    Why do marshes have that characteristically rotten egg odor?
    • A. 

      Decomposition uses much oxygen while releasing hydrogen sulfide. The reduced oxygen level combined with the release of hydrogen sulfide gives the marsh a rotten egg odor.

    • B. 

      Decomposition uses much carbon dioxide while releasing hydrogen sulfide. The reduced carbon dioxide level combined with the release of hydrogen sulfide gives the marsh a rotten egg odor.

    • C. 

      Decomposition uses much hydrogen while releasing carbon dioxide. The reduced hydrogen level combined with the release of carbon dioxide gives the marsh a rotten egg odor.

    • D. 

      Decomposition uses much hydrogen while releasing sulfur. The reduced hydrogen level combined with the release of sulfur gives the marsh a rotten egg odor.

  • 15. 
    Which statement describes what this diagram shows is happening with barrier island migration from images A-1 through A-3 ?
    • A. 

      The diagram shows how sea level rise causes barrier islands to migration upslope toward the mainland on the continental shelf.

    • B. 

      The diagram shows the formation of a barrier island on the continental slope.

    • C. 

      The diagram rising sea level erosion of a barrier islands on the continental slope.

    • D. 

      The diagram shows the migration of a barrier island.

  • 16. 
    Identify the event shown in the image.
    • A. 

      Birth of an inlet

    • B. 

      Nor'easter wind tide

    • C. 

      Formation of a tidal delta

    • D. 

      Spring tide

  • 17. 
    How deep/thick are Barrier Islands?
    • A. 

      30 - 60 feet

    • B. 

      10 - 20 feet

    • C. 

      20 - 40 feet

    • D. 

      40 - 70 feet

  • 18. 
    What does this arrow identify?
    • A. 

      Longshore current.

    • B. 

      Tidal current.

    • C. 

      Ebb tidal delta.

    • D. 

      Flood tidal delta.

    • E. 

      Littoral current.

  • 19. 
    Choose the most complete answer to this statement.  Geologists like Dr. Pilkey define a beach as:
    • A. 

      A beach is any area of shoreline affected by winds or water.

    • B. 

      A beach is any area of shoreline affected by ordinary waves that includes the nearshore sand bar and berm.

    • C. 

      A beach is an area of the shoreline that includes the berm and is affected by ordinary waves.

    • D. 

      A beach is only the large area near the berm of the shoreline affected by ordinary waves.

  • 20. 
    IDENTIFY: The two major currents that affect North Carolina's climate.
    • A. 

      Laborador/Virginia and the Gulf Stream currents

    • B. 

      Gulf of Mexico and Laborador/Virginia currents

    • C. 

      Canadian and Gulf of Mexico currents

    • D. 

      Coast of Greenland and Gulf Stream currents

    • E. 

      Between the swash zone (shoreface where waves break) and the dune

  • 21. 
    What causes shoreline habitats to have extremes in water temperature?
    • A. 

      Waves and wind

    • B. 

      Currents and tides

    • C. 

      Distance from shore and waves

    • D. 

      Currents and gravitational pull of the moon

  • 22. 
    Choose the best definition of a barrier island.
    • A. 

      A Barrier Island is a long, narrow body of sand separated from the mainland by a sound and from other islands by inlets at both ends.

    • B. 

      A Barrier Island is a short, wide body of sand separated from the mainland by a sound and from other islands by inlets at both ends.

    • C. 

      A Barrier Island is a long, narrow body of sand separated from other islands by a sound.

    • D. 

      A Barrier Island is a body of sand separated from the mainland by an inlet.

  • 23. 
    Why are estuaries considered brackish?
    • A. 

      Estuary waters are a mixture of tidewater and longshore current.

    • B. 

      Estuary waters are a mixture of soundwater and ocean water.

    • C. 

      Estuary waters are a mixture of soundwater and littoral drift.

    • D. 

      Estuary waters are a mixture of fresh and salt water.

  • 24. 
    Coastal Habitats: What are the three basic components of a food web?
    • A. 

      Three basic components of a food web are producers, consumers and decomposers.

    • B. 

      Three basic components of a food web are producers, consumers, scavengers and decomposers.

    • C. 

      Three basic components of a food web are producers, bacteria and fungi.

    • D. 

      Three basic components of a food web are autotrophs, heterotrophs and heliotrophs.

  • 25. 
    Coastal Habitats: What is the difference between scavengers and decomposers?
    • A. 

      When an organism dies, scavengers consume much of the organic debris, particularly animal debris. Decomposers are bacteria and fungi that complete the final step in the food web.

    • B. 

      When an organism dies, decomposers scavenge the remains, there is no difference between decomposers and scavengers.

    • C. 

      When an organism dies scavengers consisting of bacteria and fungi complete the process in the food web.

    • D. 

      Both are detrital. When an organism dies uneaten debris is broken down by wave action, wind, heat, forming detritus

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