Geology

4. spreading, area where plates diverge and new lithosphere is created
5. a large fracture in rock along which movement occurs
10. transfer of heat through movement of magma in the mantle
11. Waves, the fastest moving waves of earthquakes
12. the movement of the ground that occurs when rock inside the Earth pass their elastic limit
14. outermost, rigid layer of the Earth
15. core, liquid layer of the Earth's core
16. boundary, boundary between two plates moving away from each other
18. waves, waves that move at right angles in the direction of movement

1. soft upper layer of the mantle
2. layer between the crust and the core
3. the bending of rock layers
6. waves, earthquake waves, including primary waves, secondary waves and surface waves
7. outermost layer of the Earth
8. zone, a region where an oceanic plate sinks down into the asthenosphere
9. Tectonics, a theory explaining the structure of the earth's crust
10. boundary, boundary between two colliding plates
11. a supercontinent comprising all the continental crust of the earth, postulated to have existed in the late Paleozoic and Mesozoic times
13. Drift, the gradual movement of the continents across the earth's surface through geological time as proposed by Alfred Wegener
17. core, solid, dense center of the Earth