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5 Written questions

5 Matching questions

  1. Density
  2. Thermocline
  3. Sea Salts
  4. Pelagic Zone
  5. Nodules
  1. a Dissolved solids that make up about 3.5% of the mass of ocean water. These dissolved solids give the ocean its salty taste.
  2. b The ratio of the mass of a substance to the volume of the substance; commonly expressed as grams per cubic centimeter for solids and liquids and as grams per liter for gases.
  3. c The region of an ocean or body of fresh water above the benthic zone.
  4. d Potato-shaped lumps of minerals that are found on the abyssal floor of the ocean.
  5. e A layer in a body of water in which water temperature drops with increased depth faster than it does in other layers.

5 Multiple choice questions

  1. Begins at the continental slope and extends to a depth of 4,000 meters.
    animals that live there: octopi, sea stars, and brachiopods.
  2. The shallow benthic zone that most organisms live in; located on the continental shelves and is populated by organisms such as sea stars, brittle stars, and sea lilies.
  3. The area of the pelagic zone above the continental shelves. Has abundant sunlight, moderate temperatures, and relatively low water pressure.
  4. The mass of mostly microscopic organisms that float or drift freely in the waters of aquatic (freshwater and marine) environments.
  5. A method of desalination where ocean water is heated to remove salt. Heat causes liquid water to evaporate and leave dissolved salts behind. When the water vapor condenses, the result is pure fresh water.

5 True/False questions

  1. NektonAll organisms that swim actively in open water, independent of currents


  2. UpwellingA method of desalination where water is frozen. Then the first ice crystals that form do not contain salt. The ice can be removed and melted to obtain fresh water.


  3. AquacultureA floating layer of sea ice that completely covers an area of the ocean surface.


  4. Benthic ZoneThe bottom region of oceans and bodies of fresh water.


  5. DesalinationA process of removing salt from ocean water.


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