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Science Word Puzzle

24 words

Across

  • 3. Injection that prevents disease
  • 4. Pure substance on the periodic table
  • 5. Nuclear reaction powering the sun
  • 12. Gas making up 78% of atmosphere
  • 14. Force that keeps us on Earth
  • 15. How plants convert sunlight to food
  • 16. Water movement through a membrane
  • 17. Element essential to all life
  • 18. Gas we breathe to survive
  • 20. Center of an atom
  • 22. Splitting an atomic nucleus
  • 23. Range of light wavelengths

Down

  • 1. Physics of very small particles
  • 2. Noble gas that makes balloons float
  • 4. Protein that speeds up reactions
  • 6. Negatively charged atomic particle
  • 7. When one celestial body blocks another
  • 8. Cell division process
  • 9. Splits white light into colors
  • 10. Fourth state of matter
  • 11. Positively charged atomic particle
  • 13. Complete set of DNA in an organism
  • 19. Uncharged particle in an atom
  • 21. Temperature scale where water freezes at zero
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