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5 Written questions

5 Matching questions

  1. Freezing
  2. Reverse Osmosis Desalination
  3. Bathyal Zone
  4. Salinity
  5. Benthic Zone
  1. a A popular method for desalinating ocean water. It includes the use of special membranes that allow water under high pressure to pass through and that block the dissolved salts.
  2. b Begins at the continental slope and extends to a depth of 4,000 meters.
    animals that live there: octopi, sea stars, and brachiopods.
  3. c The bottom region of oceans and bodies of fresh water.
  4. d A measure of the amount of dissolved salts in a given amount of liquid. It can be written as salinity = 35 parts per thousand, or 35%.
  5. e A 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.

5 Multiple choice questions

  1. Dissolved solids that make up about 3.5% of the mass of ocean water. These dissolved solids give the ocean its salty taste.
  2. The area of the pelagic zone above the continental shelves. Has abundant sunlight, moderate temperatures, and relatively low water pressure.
  3. 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.
  4. 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. Elements that exist in very small amounts.
    ex: gold, zinc, and phosphorus.

5 True/False questions

  1. Pelagic ZoneThe region of an ocean or body of fresh water above the benthic zone.

          

  2. ThermoclineA layer in a body of water in which water temperature drops with increased depth faster than it does in other layers.

          

  3. Oceanic ZoneExtends into the deep waters beyond the continental shelf.

          

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

          

  5. Pack IceA floating layer of sea ice that completely covers an area of the ocean surface.