B3 Review Questions
  1. What two theories were combined to make the modern theory of plate tectonics?
    2. Plate tectonics is a combination of continental drift theory and the seafloor spreading theory.

  2. Why is plate tectonics now considered to be the dominant theory in Earth science?
    3. The theory of plate tectonics has become the dominant theory in Earth science because its unifying nature provides an explanation for a large number of physical processes including earthquakes, volcanoes, and mountain formation.

  3. Please match each term from column A with the most appropriate item from column B:
    4. Number COLUMN A COLUMN B
         
    3 destructive margin 1) new crust is created
    7 subduction zone 2) dominant force acting on plates
    5 plate 3) crust is lost as a result of the interaction
    6 transform fault boundary 4) movement of particles in a fluid
    2 slab pull 5) chunk of rigid lithosphere
    1 divergent boundary 6) crust is neither created nor destroyed
    4 convection 7) one plate is forced under another one