Across
- 2. There are ___________ major landmasses
- 6. This is formed when an oceanic plate and a continental plate slide towards each other, the oceanic plate sinks below the continental plate
- 8. These seismic waves are the slowest and most damaging seismic waves
- 9. The process by which new seafloor is created by magma, from the asthenosphere, filling empty space when oceanic plates separate
- 11. The favored method of measuring or an earthquake and produces a more accurate accounting of the total energy released by an earthquake
- 12. Involves rock being broken into smaller pieces
- 14. The rigid lower part of the mantle
- 15. The breaking down of rocks by water, ice, mild acids, plants, and temperature changes
- 16. An instrument which measures and records the seismic waves which travel through the Earth during an earthquake
- 18. The layer of the Earth which includes the crust and mantle and is made up of rigid rock plates that “float” on the layers below it
- 22. The type of plate boundary formed when plates collide
- 23. Scientists use these to determine what the Earth’s interior looks like
- 25. When rock composition does change, as elements (e.g. acid rain) are either added or removed
- 26. This is the result when two oceanic plates collide and form a curved line of islands
- 28. The layer of the Earth which is liquid and thought to generate Earth’s magnetic field
- 29. Developed the theory of continental drift after he noticed how Earth’s continents resembled pieces of a jigsaw puzzle
Down
- 1. The process that occurs when two tectonic plates meet at convergent boundaries, and one of the plates moves under the other one
- 2. These seismic waves arrive after primary waves because they only travel through solid material
- 3. This is how an earthquakes strength is measured by the amount of energy it releases
- 4. The type of plate boundary in which plates remain side by side and slide past each other
- 5. The common scale of earthquake measurement that describes the magnitude of an earthquake according to the amount of energy released, as recorded by seismographs
- 7. The type of plate boundary in which plates move away from each other
- 10. The layer of the Earth which is the middle section of the mantle that is a tar-like semi-liquid layer
- 13. This is the point on Earth’s surface above the focus
- 17. The transporting of weathered material
- 19. This is the point at which an earthquake begins
- 20. The layer of the Earth which is solid, made of nickel and iron, and its dense center is under pressure
- 21. These are fast moving seismic waves
- 24. The theory that continents were once connected but have drifted apart
- 27. A scientist that studies the surface of the Earth and what it is made of