Science Geology Words

5. The numerical age, in years of a rock or object.
7. A location inside Earth where seismic waves originate and rocks first movd along a fault and from which seismic waves originate
8. The name of the supercontinent that engulfed all the current continents.
9. When a slab sinks and it pulls the rest of the plate with it.
13. The study of earth's physical structure, its history, and the processes that act on it
16. When the denser tectonic plate sinks under the more buoyant plate during a convergent boundary.
17. Energy that travels as vibrations on and in earth.
18. When 2 tectonic plates collide with each other.

1. When 2 tectonic plates slide past each other.
2. The location on Earth’s surface directly above an earthquake’s focus
3. The continents are is constant drift and always moving apart.
4. The principle that in undisturbed rock layers the oldest rocks are on the bottom.
6. When rising mantle material at mid-ocean ridges creates the potential for plates to move away from the ridge.
10. The age of rocks and geologic features compared with other rocks and features nearby.
11. Theory that states that Earth’s surface is made of rigid slabs of rock, or plates, that move with respect to each other.
12. A boundary that forms when 2 tectonic plates separate.
14. The cold and rigid outermost rock layer of earth.
15. The circulation of material caused by differences in temperature and density.
19. An area of extreme earthquake and volcanic activity in the pacific ocean.