General knowledge

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Across
  1. 2. Scientist known for relativity (7)
  2. 3. Mountain that erupts molten lava (7)
  3. 6. Scientist famous for laws of motion and gravity (6)
  4. 9. Geometric shape with triangular sides (7)
  5. 10. Event when the Sun or Moon is blocked (7)
  6. 11. Africa’s tallest mountain (12)
  7. 13. Classical dance form (6)
  8. 14. Largest planet in our solar system (7)
  9. 15. System where people vote for leaders (8)
  10. 18. Continent with countries like France and Germany (6)
  11. 19. Longest river in the world (4)
  12. 20. Country known for maple syrup and ice hockey (6)
Down
  1. 1. Awareness of facts across many subjects (16)
  2. 4. Gas essential for breathing (6)
  3. 5. Ancient structures in Egypt (8)
  4. 7. Famous English playwright (10)
  5. 8. Sport played with a round ball and two goals (6)
  6. 12. Ocean between the Americas and Europe/Africa (8)
  7. 16. Second largest continent (6)
  8. 17. Chemical formula for water (3)