Across
- 2. Boundary A boundary where tectonic plates slide past each other.
- 4. Boundary A plate boundary where two tectonic plates move apart.
- 10. The movement of weathered rock and soil from one place to another.
- 14. Igneous Rock Igneous rock formed when magma cools slowly underground.
- 17. The breakdown of rocks into smaller pieces.
- 18. The point on Earth's surface directly above an earthquake focus.
- 19. Rock Rock changed by heat and pressure.
- 21. A sudden shaking of the ground caused by movement in Earth's crust.
- 22. A rock containing enough valuable mineral to be mined profitably.
- 24. Spot An area where magma rises through Earth's crust away from plate boundaries.
- 25. The point inside Earth where an earthquake begins.
- 26. Cycle The continuous process by which rocks change from one type to another.
- 28. The increase in vibration when forces match an object's natural frequency.
- 30. Hardness Scale A scale used to compare the hardness of minerals.
- 31. Igneous Rock Igneous rock formed when lava cools quickly on Earth's surface.
- 36. Drift The idea that continents slowly move across Earth's surface over time.
- 38. Magma that reaches Earth's surface.
- 39. Boundary A plate boundary where two tectonic plates move towards each other.
- 40. Rock Rock formed from compacted sediments.
- 41. The preserved remains or traces of ancient organisms.
- 42. The study of magnetic patterns preserved in rocks.
- 43. The study of Earth's structure, rocks and processes.
Down
- 1. Rock Rock formed from cooled magma or lava.
- 3. Ridge An underwater mountain chain formed at divergent boundaries.
- 5. How much light passes through a mineral.
- 6. The way a mineral reflects light.
- 7. Scale An older scale used to measure earthquake magnitude.
- 8. Tectonics The theory explaining movement of Earth's tectonic plates.
- 9. A naturally occurring substance with a definite chemical composition.
- 11. Waves Energy waves produced by earthquakes.
- 12. The colour of a mineral in powdered form.
- 13. Currents Circular movements in liquids or gases caused by heat transfer.
- 15. Molten rock beneath Earth's surface.
- 16. A liquid’s resistance to flowing.
- 20. The transfer of heat through direct contact.
- 23. A solid material with particles arranged in a regular pattern.
- 25. A crack in Earth's crust where movement has occurred.
- 27. An ancient supercontinent made of all Earth's landmasses joined together.
- 29. The tendency of a mineral to split along flat surfaces.
- 32. An opening in Earth's crust where magma, gases and ash escape.
- 33. A large sea wave caused by underwater earthquakes or volcanic eruptions.
- 34. Flow A fast-moving flow of hot gas, ash and rock from a volcano.
- 35. A mineral’s resistance to scratching.
- 37. Spreading The process where new crust forms at mid-ocean ridges.
- 40. The process where one tectonic plate moves beneath another.