Tectonic Theory Vocabulary

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Across
  1. 4. Movement of hot material in the mantle that causes tectonic plates to move
  2. 5. The fastest seismic wave; move through liquids and solids
  3. 6. Type of boundary where plates move towards each other; crust is destroyed by subduction; causes volcanoes & mountains
  4. 9. Release of built up stress between tectonic plates at a transform boundary
  5. 10. Seismic waves that only travel at the surface of the Earth.
  6. 11. Theoretical supercontinent, composed of all 7 continents connected together
Down
  1. 1. Slower than P waves; only move through solids
  2. 2. Opening in Earth's crust where magma reaches the surface as lava
  3. 3. Type of boundary where plates move away from each other; new crust is formed when magma rises and cools; valleys, trenches, Mid Ocean Ridge
  4. 7. Type of boundary where plates move parallel to each other; crust is not created or destroyed; earthquakes occur when stress in the rock is released
  5. 8. When one tectonic plate is pushed under another and into the mantle; occurs at subduction zones (where continental and oceanic crust meet - more dense oceanic crust subducts into the mantle)