Across
- 1. the edge of two plates meeting; location of most geological processes
- 3. (OCEAN FLOOR) lithosphere spanning 5- 10 kilometers thick; crust is very dense due to igneous composition (made up of igneous rocks)
- 6. chains of active volcanoes with large amounts of seismic activity; located along convergent boundary subduction zones
- 12. two lithosphere plates moving toward each other
- 13. (LAND) lithosphere that can span up to 40 kilometers thick; this crust is much more buoyant due to the composition of silica and aluminum
- 14. two tectonic plates moving in opposite directions (pulling apart)
- 16. BOUNDARY fault along a plate boundary where movement occurs in horizontal motion; two plates rubbing side by side (against each other)
- 17. large, elevated area of land raised above the surrounding area
Down
- 2. underwater plain on the sea floor lying between the foot of a continental shelf and a mid-ocean ridge
- 4. a volcanic mountain range formed when an oceanic plate and a continental plate collide at a convergent boundary as a result of a subduction zone
- 5. landforms created when tectonic plates are pushed together, warping rock and debris into hills and mountains; occurs because both plates have the same density; occurs near convergent boundaries
- 7. RIDGE seafloor mountain system; occurs where seafloor plates spread away from each other
- 8. a lowland area that forms when tectonic plates move apart
- 9. one tectonic plate is driven below another; created at convergent boundaries
- 10. a region where old lithosphere is recycled back into the earth
- 11. mountain or hill with an opening for magma to come out
- 15. cracks in the earth’s curst; along these cracks movement occurs