earth and a little plate tectonics

5. The Crust The Mantle Convection Currents Outer Core Inner Core
8. the gradual movement of the continents across the earth's surface through geological time
10. a current in a fluid that results from convection.
11. first waves from an earthquake to arrive at a seismograph
12. a layer inside a terrestrial planet and some other rocky planetary bodies
13. the central part of the earth
14. secondary waves, or shear waves

1. the rigid outer part of the earth, consisting of the crust and upper mantle.
2. It lies below the lithosphere, at depths between approximately 80 and 200 km below the surface
3. is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core
4. is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge
6. a supercontinent that existed during the late Paleozoic and early Mesozoic eras
7. the region surrounding the earth or another astronomical body in which its magnetic field is the predominant effective magnetic field
9. the waves of energy caused by the sudden breaking of rock within the earth or an explosion
13. the out most layer of the earth