Science Crossword Puzzle (Form 3)

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Across
  1. 3. — A series of repeating events
  2. 4. — Automatic body response
  3. 5. — Organ producing insulin
  4. 6. — Ability to store electric charge
  5. 7. — Water movement across a semipermeable membrane
  6. 9. — Visible electromagnetic wave
  7. 13. — Natural environment of an organism
  8. 17. — Optical device refracting light
  9. 18. — Combination of two or more atoms
  10. 20. — The basic unit of life
  11. 21. — Male reproductive cell
  12. 23. — Simple carbohydrate compound
  13. 24. — Gas changing to liquid
  14. 27. — Bending of light
  15. 28. — Size or extent of a quantity
Down
  1. 1. — Process of ovum formation
  2. 2. — Emission of light by a substance
  3. 3. — Substance increasing reaction rate without permanent change
  4. 5. — Essential nutrient for body tissues
  5. 8. — Anything with mass and volume
  6. 10. — Force of attraction between masses
  7. 11. — Group of cells with similar function
  8. 12. — Study of substances and reactions
  9. 14. — Phenomenon related to electric charge
  10. 15. — Chemical substance regulating body processes
  11. 16. — Electrical component limiting current
  12. 19. — Biological catalyst speeding up chemical reactions
  13. 22. — The ability to do work
  14. 25. — A disturbance transferring energy
  15. 26. — Smallest unit of matter in chemical elements