1-a,2-a, 1-b,2-b 15.1 Assessment

15 Questions | Total Attempts: 251

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1-a,2-a, 1-b,2-b 15.1 Assessment

This will cover concepts in Section 1 of Unit 15 Composition of Seawater.


Questions and Answers
  • 1. 
    Take a look at this video.  Tell me how density, salinity and temperature are related.   Alike?   Different? http://www.sciencelearn.org.nz/Contexts/The-Ocean-in-Action/Sci-Media/Video/Why-salinity-and-temperature-are-measured
  • 2. 
    The ocean's surface water temperature vaires with the amount of solar radiation received,  which is a direct function of ______________.
    • A. 

      Latitude

    • B. 

      Meredian

    • C. 

      Longitude

  • 3. 
    Take a look at this image.   Choose the BEST answer that describes this image.
    • A. 

      The higher the temperature the higher the density

    • B. 

      The lower the temperature the lower the density

    • C. 

      The lower the temperature the higher the density

  • 4. 
    Which of the following is NOT a process that DECREASES the salinity of seawater?
    • A. 

      Runoff from land

    • B. 

      Icebergs melting

    • C. 

      Precipitation

    • D. 

      Evaporation

  • 5. 
    What is the salinity of seawater?
    • A. 

      1.5 percent

    • B. 

      3.5 percent

    • C. 

      10 percent

    • D. 

      25 percent

  • 6. 
     In this layer of the ocean between 300 meters and 1000 meters, there is a rapid change of temperature with depth.
    • A. 

      Surface zone

    • B. 

      Thermocline

    • C. 

      Abyssal zone

  • 7. 
    What units are used to measure the salinity of ocean water?
    • A. 

      Percent

    • B. 

      Parts per billion

    • C. 

      Parts per thousand

    • D. 

      Parts per million

  • 8. 
    Examine this image.     Sodium is the largest component of sea water
    • A. 

      True

    • B. 

      False

  • 9. 
    Most of the salt in seawater is ____________  _________________   or common table salt.
    • A. 

      Potassium chloride

    • B. 

      Magnesium phosphate

    • C. 

      Sodium chloride

    • D. 

      Calcium carbonate

  • 10. 
    All water, even rainwater contains dissolved chemicals that scientists call a_______.
    • A. 

      Precipitates

    • B. 

      Salts

    • C. 

      Evaporates

  • 11. 
    If the salt could be removed from the ocean there would be a layer _________ thick all over the surface of the Earth.
    • A. 

      1500

    • B. 

      1000

    • C. 

      500

    • D. 

      250

  • 12. 
    Ocean water is a very weak solution of only 2 elements,  Sodium and Chlorine
    • A. 

      True

    • B. 

      False

  • 13. 
    Rivers carry an estimated ___________ __________ tons of salts into the ocean annually.
    • A. 

      1 million

    • B. 

      4 billion

    • C. 

      2 million

    • D. 

      3 trillion

  • 14. 
    The ocean is supplied with enough asaltsa to maintain its salinity for millions of years because of the
    • A. 

      Carbon cycle.

    • B. 

      Nitrogen cycle.

    • C. 

      Hydrologic cycle.

    • D. 

      Unicycle