Revising Geophysics, Rocks & Minerals

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