Grade 9 Unit 1 Wonders of the world

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Across
  1. 2. Small pieces of matter; can refer to atoms or molecules.
  2. 4. Northern Lights; natural light display in the sky.
  3. 5. The process of being worn away by natural forces like water.
  4. 9. Marine organism that builds reefs; often colorful and diverse.
  5. 11. Observable events, often unusual or remarkable.
  6. 12. An opening in the Earth's crust that can erupt with lava.
  7. 13. Offering a wide view of an area; comprehensive in scope.
  8. 14. Relating to a nation; often refers to parks or monuments.
  9. 15. A structure built to remember a person or event.
  10. 18. A community of living organisms and their environment.
  11. 20. Relating to the structure and substance of the Earth.
  12. 21. Small shaking movements, often caused by geological activity.
Down
  1. 1. Referring to the Northern Lights, especially aurora borealis.
  2. 3. The visible features of an area of land; scenery.
  3. 6. The action or process of observing something to gain information.
  4. 7. A ridge of rocks or coral in the sea, often supporting marine life.
  5. 8. A deep valley with steep sides, often carved by a river.
  6. 10. Covering a wide area; extensive.
  7. 16. A journey undertaken for a specific purpose, especially exploration.
  8. 17. The highest point of a mountain or hill.
  9. 19. The height of something above sea level.