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Science Word Puzzle

24 words

Across

  • 4. Negatively charged atomic particle
  • 6. Two or more atoms bonded together
  • 7. Cell division process
  • 10. Lightest and most abundant element
  • 11. Preserved remains of ancient life
  • 16. Fourth state of matter
  • 17. How plants convert sunlight to food
  • 19. Nuclear reaction powering the sun
  • 20. Protein that speeds up reactions
  • 21. Center of an atom
  • 22. Range of light wavelengths
  • 23. Water movement through a membrane

Down

  • 1. Pure substance on the periodic table
  • 2. Electric potential difference
  • 3. Temperature scale where water freezes at zero
  • 5. Gas making up 78% of atmosphere
  • 8. Force that keeps us on Earth
  • 9. Noble gas that makes balloons float
  • 12. Injection that prevents disease
  • 13. Particle of light
  • 14. Splits white light into colors
  • 15. Positively charged atomic particle
  • 18. Physics of very small particles
  • 20. When one celestial body blocks another
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