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  • Activities. Studying the ocean floor
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      Activities. Studying the ocean floor
      Tectonic plates
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      Studying the ocean floor. Activities 25- 40

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      Activities. Studying the ocean floor
      Tectonic plates
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      Activity 25

      P

      Apply

      Use the diagram to explain how sonar works.

      Ship using sonar

        1 attempt
      Done
      Activities. Studying the ocean floor
      Tectonic plates
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      Activity 26

      0/15
      Understand

       

      Use an atlas or Internet application such as Google Maps or Google Earth to find the names of the Island arcs (1-8) and the ocean ridges (A-G).

      Philippines

      Lesser Anntilles (Caribbees)

      Tonga

      Southwest Indian Ridge

      East Pacific Rise

      South Georgia and the South Sandwich Islands

      Southeast Indian Ridge

      Aleutian Islands

      Japan

      Kuril Islands

      Pacific Antarctic Ridge

      Mid-Atlantic Ridge

      Mariana Islands

      Juan de Fuca Ridge

      Central Indian Ridge

      Island arcs Ocean ridges
      1. A.
      2. B.
      3. C.
      4. D.
      5. E.
      6. F.
      7. G.
      8.  

       

        Philippines Lesser Anntilles (Caribbees) Tonga Southwest Indian Ridge East Pacific Rise South Georgia and the South Sandwich Islands Southeast Indian Ridge Aleutian Islands Japan Kuril Islands Pacific Antarctic Ridge Mid-Atlantic Ridge Mariana Islands Juan de Fuca Ridge Central Indian Ridge

        3 attempts
      Done
      Activities. Studying the ocean floor
      Tectonic plates
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      Activity 27

      0/5

      Analyse

      What differences can you see between these two oceans?

      • There is a trench next to the continent and the continent has volcanoes.

      • There are no trenches nor volcanoes near the coast of the continent.

      • There is a volcanic mountain range in the continent.

      • The continental slope connects the continental shelf with the abyssal plain.

      • There is a guyot and a volcanic island.

      Ocean on the left

        Ocean on the left

        Ocean on the right

          Ocean on the right

            /*%%SmartyNocache:14335235876820bf96c3e4b1_27503817%%*/smarty->registered_plugins[Smarty::PLUGIN_FUNCTION]['textweb'][0], array( array('name'=>"slide_classify_initial_group",'value'=>"Ninguno",'value_en'=>"Reset"),$_smarty_tpl ) );?> /*/%%SmartyNocache:14335235876820bf96c3e4b1_27503817%%*/ Ocean on the left Ocean on the right

            3 attempts
          Done
          Activities. Studying the ocean floor
          Tectonic plates
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          Activity 28

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          Create

          Guyots are extinct and submerged volcanoes, with flat tops. Make a hypothesis to show the formation of guyots. What effect do you think their formation had on isostasy?

            1 attempt
          Done
          Activities. Studying the ocean floor
          Tectonic plates
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          Activity 29

          0/1

          Analyse

          Compare the thickness, age and density of the continental and oceanic crust.

          • Oceanic crust is thinner, younger and less dense than the continental crust.

          • Correct answer
            Wrong answer

          • Oceanic crust is thinner, older and denser than the continental crust.

          • Correct answer
            Wrong answer

          • Oceanic crust is thinner, younger and denser than continental crust.

          • Correct answer
            Wrong answer

            3 attempts
          Done
          Activities. Studying the ocean floor
          Tectonic plates
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          Activity 30

          0/1

          Analyse

          What happens to the thickness of sediment further away from the ridge? What could be the cause of this?

          The difference between the oceanic and continental crust

          • The thickness decreases because, the further away we go from the ridge, the older the ocean floor is, so sediment has been depositing on it for longer.

          • Correct answer
            Wrong answer

          • The thickness increases because the further away we go from the ridge, the younger the ocean floor is, so sediment has been depositing on it for longer.

          • Correct answer
            Wrong answer

          • The thickness of sediment near and far way from the ridge is always the same, as the sediment has been depositing everywhere at the same time.

          • Correct answer
            Wrong answer

            3 attempts
          Done
          Activities. Studying the ocean floor
          Tectonic plates
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          Activity 31

          P

          Create

          Describe the landforms found on the ocean floor that are not found on the continents.

            1 attempt
          Done
          Activities. Studying the ocean floor
          Tectonic plates
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          Activity 32

          P

          Create

          Find information about the first big oceanographic expedition carried out by the Challenger, in the 19th century. Compare its technology with modern oceanographic ships.

            1 attempt
          Done
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