General Knowledge

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Across
  1. 2. Enlarge an image.
  2. 7. Orbits a planet.
  3. 8. Extremely cold region.
  4. 11. Study of the Earth's surface.
  5. 12. Famous physicist.
  6. 14. Celestial event.
  7. 16. Electrical discharge during a storm.
  8. 18. Interconnected natural environment.
  9. 19. Study of celestial bodies.
  10. 20. Exceptional intelligence.
  11. 22. Where the sky meets land or sea.
  12. 23. Largest land mammal.
  13. 25. Houses books and knowledge.
  14. 27. Vast body of water.
  15. 29. Creates new devices.
  16. 30. Travels in space.
Down
  1. 1. Changes color.
  2. 3. A massive system of stars.
  3. 4. Erupts molten rock.
  4. 5. Studies human history through artifacts.
  5. 6. Gaseous layer around Earth.
  6. 9. Sound during a storm.
  7. 10. Largest ocean.
  8. 13. Art of capturing images.
  9. 15. Our solar system has eight of these.
  10. 17. Preserved remains of ancient life.
  11. 21. Swirling wind funnel.
  12. 24. Finding something new.
  13. 26. Attracts metal.
  14. 28. Represents the Earth.