plate Tectonics

2. / to move apart
3. / pieces of the lithosphere that are made of a rigid layer of the uppermost mantle and/or a layer of oceanic or continental crust
6. tectonics / a theory of global tectonics
7. currents / Movement of hot fluids
9. / underwater mountain range that run through oceans
11. / when one plate is drawn down by another
13. / vent in earths crust where lava comes out
14. floor spreading / process of new oceanic lithosphere forming as magma rises towards surface and becomes solid
15. / to come together
16. of fire / linear zone of volcanic activity

1. plate boundary / a place where two tectonic plates meet
4. st helens / an active volcano inn south west Washington
5. / region below the lithosphere
6. / all land
7. / stress that occurs when forces act to occur when forces act to squeeze an object
8. / rigid layer of earths crust
10. / series of vibrations in earth's crust
12. / to convert or change