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5 Written questions

5 Matching questions

  1. uranium
  2. Island arc
  3. radioactive dating
  4. mid-ocean ridge
  5. deep-ocean trench
  1. a A curved line of volcanic islands formed by the subduction of one piece of oceanic crust under another piece of oceanic crust.
  2. b The deepest parts of the ocean where old oceanic crust is subducting under another piece crust and is destroyed.
  3. c A radioactive elements that over time changes into lead
  4. d A method of determining the age of an object by measuring the amount a radioactive element it contains
  5. e A long chain of underwater mountains that circles the globe and produces new oceanic crust.

5 Multiple choice questions

  1. A crack in the earth's crust where the two sides are moving in opposite directions or in the same direction but at different speeds.
  2. The area between the parallel sets of mountain ranges of a mid-ocean ridge from which magma is pouring to make new oceanic crust.
  3. A German scientist who proposed the theroy of continental drift
  4. A straight line of volcanic mountains that forms over a hotspot located in the middle of a plate.
  5. Lava that cools underwater, taking on a distinctive shape as it hardens.

5 True/False questions

  1. divergent boundaryA plate boundary where two plates move toward each other.

          

  2. magnetic fieldlarge sections of the lithosphere that are moved by convection currents in the mantle

          

  3. sonarA crack in the earth's crust where the two sides are moving in opposite directions or in the same direction but at different speeds.

          

  4. non-volcanic mountain rangeMountain ranges formed by the collision of two pieces of continental crust that push upwards from both sides.

          

  5. Theory of Plate TectonicsAlfred Wegener's idea that the continents were joined together in a supercontinent called Pangaea and then drifted apart.