← All Free Puzzles

Science Crossword Challenge

26 words

Across

  • 2. Pure substance on the periodic table
  • 3. Gas making up 78% of atmosphere
  • 5. Electric potential difference
  • 8. Noble gas that makes balloons float
  • 13. Cell division process
  • 14. Lightest and most abundant element
  • 16. How plants convert sunlight to food
  • 17. Element essential to all life
  • 18. Preserved remains of ancient life
  • 21. Fourth state of matter
  • 22. Gas we breathe to survive
  • 23. Physics of very small particles
  • 24. Protein that speeds up reactions

Down

  • 1. Uncharged particle in an atom
  • 4. Force that keeps us on Earth
  • 6. Temperature scale where water freezes at zero
  • 7. Splitting an atomic nucleus
  • 9. Two or more atoms bonded together
  • 10. Water movement through a membrane
  • 11. Positively charged atomic particle
  • 12. Splits white light into colors
  • 13. Object that attracts iron
  • 15. Center of an atom
  • 18. Nuclear reaction powering the sun
  • 19. Range of light wavelengths
  • 20. Complete set of DNA in an organism
Make Your Own Custom Puzzle - $1