Across
- 2. waves, The fastest waves produced by an earthquake.
- 3. An opening in a weak part of the Earth’s crust in which lava, steam, gases or ash is ejected
- 6. A type of rock formed from cooled magma.
- 10. Metamorphism that occurs to rock near magma.
- 11. The instrument used to record earthquakes.
- 12. A type of rock which is formed by the compaction and cementation of sediments.
- 15. A type of volcano which has steep sides and sticky, high viscosity lava.
- 16. The name for the scale used to measure earthquake magnitude.
- 17. thickest internal layer of the Earth.
- 18. core, The hottest internal layer of the Earth.
- 19. tectonics, The theory that the crust is split into several plates which move due to mantle convection currents.
Down
- 1. chamber, The name of the reservoir of magma within the earth's crust beneath a volcano.
- 2. Igneous rock that has cooled in the crust.
- 4. A type of rock that forms due to high pressures and temperatures.
- 5. Sedimentary rocks often have a lot of ______________.
- 7. A type of weathering that is caused by animals or plants.
- 8. The type of plate boundary found near the North Island.
- 9. The point on the Earth's surface directly above where an earthquake originated.
- 13. A volcano that has not erupted recently but is expected to do so at some point is known as ___________________.
- 14. A volcano which has erupted recently or is currently erupting.