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5 Written questions

5 Matching questions

  1. Phytoplankton
  2. Pack Ice
  3. Nekton
  4. Sublittoral Zone
  5. Thermocline
  1. a A layer in a body of water in which water temperature drops with increased depth faster than it does in other layers.
  2. b 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. c All organisms that swim actively in open water, independent of currents
  4. d Microscopic plants in the ocean that provide food to many of the ocean's organisms.
  5. e A floating layer of sea ice that completely covers an area of the ocean surface.

5 Multiple choice questions

  1. The bottom region of oceans and bodies of fresh water.
  2. Begins at the continental slope and extends to a depth of 4,000 meters.
    animals that live there: octopi, sea stars, and brachiopods.
  3. The region of an ocean or body of fresh water above the benthic zone.
  4. 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. Extends into the deep waters beyond the continental shelf.

5 True/False questions

  1. Intertidal ZoneThe shallowest benthic zone that lies between the low-tide and high-tide lines.

          

  2. PlanktonThe mass of mostly microscopic organisms that float or drift freely in the waters of aquatic (freshwater and marine) environments.

          

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

          

  4. 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.

          

  5. SalinityThe 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.