Erosion and Weathering Crossword

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Across
  1. 2. In an investigation, you want it to be a ____ test (4)
  2. 4. A form of weathering, an example of which is acid rain (8)
  3. 6. Small pieces of rock or other hard material that has been broken down over time (8)
  4. 8. A form of weathering, an example of which is when water freezes in a rock, and the expansion causes the rock to break (8)
  5. 11. The person who asks the teacher for help in a science investigation (7)
  6. 13. The process of breaking rocks into smaller pieces (10)
  7. 14. Using this type of evidence scientists knew that the land covering the Earth had once been all joined together (6)
  8. 15. The person who keeps the group on track in a science investigation (8)
  9. 17. The inner layer of the Earth (9)
  10. 19. Covers most of the world (5)
  11. 20. We make these in investigations, after we've decided what we'll be investigating (10)
Down
  1. 1. The person who collects all the equipment in a science investigation (7)
  2. 3. The outer layer of the Earth (4)
  3. 5. The layer of the Earth beneath the Crust (6)
  4. 7. Movement of sediment from one location to another (7)
  5. 9. A scientist who studies rocks (9)
  6. 10. The layer of the Earth that wraps around the Inner Core (9)
  7. 12. Acids, decaying plants and water can cause this (10)
  8. 16. Studied by geologists, weathering affects this (9)
  9. 18. Caused by wind, water and ice (7)