Across
- 5. the process of continents breaking up, subsiding and allowing in the sea
- 6. spreading- it is the process of new crust forming at the ocean ridges and spreading outwards
- 7. tectonics- it is the theory that the Earth’s crust is cracked into many large pieces that move on the asthenosphere
- 8. it is a layer of ‘plastic’ semi-solid rock in the lower mantle
- 9. it is the crust that forms the ocean floor
- 14. it is the crust that forms the continents
- 18. waves- it is the shaking, wave-like movement of the ground in an earthquake
- 19. it is between the Earth's core and crust and is hot but not as hot as the core
- 22. boundary- it is where plates are colliding with each other
- 23. it is the centre of the Earth and is very hot
- 24. boundary- it is where plates are sliding parallel to each other but in opposite directions
- 25. it is when oceanic crust collides with continental crust, and the oceanic plate then sinks below the continental plate
- 27. it is a line determined by the intersection of a geological fault and the Earths surface
- 28. it is a biological community of interacting organisms and their physical environment
- 30. it is a huge wave in the ocean caused by an earthquake occurring on the seafloor
Down
- 1. it is the point on the Earth’s surface directly above the focus of an earthquake
- 2. isolated places away from plate boundaries where a lot of hot magma is being created
- 3. it is patterns of magnetism trapped in rocks on each side of plate boundaries
- 4. drift- it is the separating of continents by drifting across the oceans
- 7. it is a longitudinal seismic wave that travels fast through the Earth
- 10. it is an instrument that detects the seismic waves from an earthquake
- 11. it is molten rock below the Earth’s surface
- 12. it is the crust of the upper mantle of the Earth
- 13. it is a transverse seismic wave that travels through the Earth
- 15. it is a deep trench in the ocean floor that is much deeper than the rest of the ocean floor
- 16. it is the process of determining an approximate age for an artefact
- 17. it is determining the relative order of past events, without determining the age
- 20. it is a place where extremely hot material form inside the Earth erupts at the surface
- 21. it is the rapid movement of the ground, usually back and forth and up and down in a wave motion due to the movement of tectonic plates
- 26. boundary- it is where plates are moving apart from each other in opposite directions
- 29. it is molten rock that has erupted onto the Earth’s surface