KS3 Science Crossword

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Across
  1. 2. Crossword Questions
  2. 5. substance that increases rate of reaction without being used up
  3. 6. class of animal of American bullfrog
  4. 11. often referred to as the powerhouse of the cell
  5. 13. organ affected by excessive consumption of alcohol
  6. 14. direct transition from a solid to a gas
  7. 16. is the sun a planet?
  8. 17. least reactive alkali metal
  9. 19. most common element in the air
  10. 20. Element with symbol Hg
Down
  1. 1. largest organ in the body
  2. 2. tiny holes on the surface of plants used for photosynthesis
  3. 3. an area in which plants and animals interact with each other and their surroundings
  4. 4. noble gas with similar name to famous comic book element
  5. 7. opposite of 9 down
  6. 8. the letters in newtons second law alphabetically arranged
  7. 9. a substance with a pH less than 7
  8. 10. Element with symbol Au
  9. 12. tiny air sacs found at the end of bronchioles
  10. 15. antagonistic muscle to bicep
  11. 18. Element with symbol He