Plate Tectonic

5. a region where the rigid plates are moving apart, typically by the ocenicc riges
8. a boundary in which 2 plates slide past eachhothere withoutncreating or destroying lithosphere
11. The proposed super continent that 200 million years ago began to break and form the present landform
12. sometimes show themselves on earths surface as hot spots amd volcanos
13. a concentration of heat in the mantle capable of producing magma which rises to earths surface
14. is thought to be the primary downward arm of convective flow

1. a magnetic field oppsite to that which esist at present
2. the motion of matter resultiing from convection
3. a hypothesis that origianly proposed that the continents had once been joined to become a super continent that broke and drifted.
4. a boundary in which 2 plats move together.
6. the naual remnant magnetism in rock bodies the permanent magneization acquired b rock that can be used to determine location of magnetic poles.
7. the theory that proposes that earts outer shell consist of indivisual plates that interact in various was
9. a magnetic field that is the same as that which is at prevent
10. causes oceanic lithospher to slide down the sides of the oceanic ridge
15. 1 of numerous rigid sections of lithosphere that moves as a unit over the material of the asthenoshpere