geology

2. waves/ stored energy that is released in the form of intense vibrations during an earthquake
7. rock/ a rock formed by cooling and solidification
9. the study of Earth and rocks
11. instruments that record the vibrations of the Earth during and earthquake
14. rock/ igneous rocks formed from the molten lava that flows onto the surface of the Earth
16. below the lithosphere that plates float on
17. two plates collide against one another
19. the boundary between two plates that have been displaced

1. A portion of Earth made up of the crust and the solid portion of the upper mantle
3. boundary/ two plates slide past each other
4. two plates move away from one another
5. theory that the continents were connected together at one point
6. the position on the surface of the Earth directly above the focus of an earthquake
8. scientist who made a theory that the plates were moving
10. theory that Earth's crust is made up of rigid plates that move
12. a rock formed by heat and pressure
13. people who study earthquakes
15. rock/ a rock formed by weathering and erosion
18. molten rock that triggers earthquakes and creates volcanoes as it rises within the Earth
20. magma that rises to earth's suface