Earth Science

2. geological features formed when magma rises to the surface of the Earth and escapes through an opening in the crust
7. study of the Earth including rock and landforms
9. seismic activity that occurs due to a release of pressure and movement in the lithosphere
10. rigid layer formed by the upper mantle and the crust
12. a sudden, violent outburst of lava, rock, ash and chemicals, originating from a volcano
14. downward sliding of a mass of earth and rock, usually over a confined area
16. a section of lithosphere that moves over the asthenosphere
17. a fracture in the crust where there is movement relative to the opposing block

1. boundaries where two lithospheric plates are moving towards each other resulting in collision zones and/or subduction zones.
3. molten rock that flows from a volcano or from a crack in the Earth
4. a zone formed where oceanic crust meets continental crust causing the less dense continental crust to override the denser oceanic crust
5. the lower part of the mantle which is fluid in nature, thus allowing the plates of lithosphere to 'float' on top
6. a mixture of molten or semi molten rock, volatiles and solids that is found beneath the surface of the Earth
8. the viscous layer of the Earth under the crust. Contain convection currents
11. boundaries where two lithospheric plates slide past each other and usually occur in the oceanic crust
13. the original supercontinent containing the entire land mass of the Earth
15. boundaries where two lithospheric plates and moving away from each other