Across
- 4. Movement of hot material in the mantle that causes tectonic plates to move
- 5. The fastest seismic wave; move through liquids and solids
- 6. Type of boundary where plates move towards each other; crust is destroyed by subduction; causes volcanoes & mountains
- 9. Release of built up stress between tectonic plates at a transform boundary
- 10. Seismic waves that only travel at the surface of the Earth.
- 11. Theoretical supercontinent, composed of all 7 continents connected together
Down
- 1. Slower than P waves; only move through solids
- 2. Opening in Earth's crust where magma reaches the surface as lava
- 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
- 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
- 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)