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5 Written questions

5 Matching questions

  1. Abyssal Zone
  2. Upwelling
  3. Freezing
  4. Nekton
  5. Neritic Zone
  1. a 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.
  2. b Has no sunlight because it begins at a depth of 4,000 meters and extends to a depth of 6,000 meters.
    organisms that live there: sponges and worms
  3. c All organisms that swim actively in open water, independent of currents
  4. d The area of the pelagic zone above the continental shelves. Has abundant sunlight, moderate temperatures, and relatively low water pressure.
  5. e The movement of deep, cold, and nutrient-rich water to the surface.

5 Multiple choice questions

  1. Potato-shaped lumps of minerals that are found on the abyssal floor of the ocean.
  2. Dissolved solids that make up about 3.5% of the mass of ocean water. These dissolved solids give the ocean its salty taste.
  3. Begins at the continental slope and extends to a depth of 4,000 meters.
    animals that live there: octopi, sea stars, and brachiopods.
  4. The shallowest benthic zone that lies between the low-tide and high-tide lines.
  5. 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.

5 True/False questions

  1. PhytoplanktonMicroscopic plants in the ocean that provide food to many of the ocean's organisms.


  2. SalinityA 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%.


  3. PlanktonAll organisms that swim actively in open water, independent of currents


  4. DensityThe 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.


  5. BenthosOrganisms that live at the bottom of oceans or bodies of fresh water.