Science Class Crossword Example

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Across
  1. 4. Galaxy
  2. 7. Photometer
  3. 8. Antimatter
  4. 9. Inflation
  5. 10. Parallax
  6. 11. Redshift
  7. 12. Doppler Shift
  8. 15. Electromagnetism
  9. 18. Time
  10. 20. Blueshift
  11. 23. Primeval Fireball
  12. 24. Cepheid
  13. 25. Cosmology
Down
  1. 1. Critical Density
  2. 2. Black Hole
  3. 3. Space (shape)
  4. 5. Dark Matter
  5. 6. Fundamental Forces
  6. 13. Kelvin
  7. 14. Temperature
  8. 16. Singularity
  9. 17. Light-year
  10. 19. Voids
  11. 21. Dipole
  12. 22. Matter Era