Geosystems crossword 1

4. Rocks formed by crystallisation of molten rock (magma or lava).
5. Rocks formed after other rocks are weathered, eroded, transported, deposited and compacted into rock.
6. Ductile layer on which the plates move.
7. Where plates move past one another without being created or destroyed.
9. Forms the bulk of the Earth and convects slowly.
12. Where lithosphere is destroyed and recycled back into the asthenosphere.
14. The most common type of mineral.
16. The theory that the Earth's lithosphere is divided into plates and they move over the surface of the Earth.
18. Set of geological process that relates all three rock classes.
19. The tendency of minerals to break along a regular plane.
20. Process occurring in the mantle that moves the plates.

1. Rigid layer that forms the plates.
2. Naturally occurring, solid, crystalline substance.
3. Where lithosphere is created.
8. Geophysical boundary between the crust and the mantle.
10. core Metallic centre of the Earth.
11. Rocks formed after other rocks are subjected to pressure (buried) and temperature (heated).
12. Process that forms crystals.
13. core Liquid part of the Earth that generates the magnetic field.
15. The shape that silicon and oxygen ions are arranged in to build up the silicate structure.
17. One plate being pushed beneath another into the asthenosphere.