Science

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Across
  1. 2. the study of living things
  2. 4. similar image
  3. 5. amount
  4. 7. elements combine to form new...
  5. 9. normal, everyday
  6. 11. a form of energy made by the movement of particles
  7. 13. similar poles repel, while opposite poles attract
  8. 16. unexpected
  9. 18. force that pulls everything toward it
  10. 19. the study of how the universe works
  11. 20. dirty marks
Down
  1. 1. disadvantage
  2. 3. occur all around us
  3. 6. something which can be used again
  4. 7. therefore
  5. 8. instruments, equipment
  6. 10. scientists have discovered 109 of these
  7. 12. almost completely
  8. 14. possibility
  9. 15. the study of what things are made of
  10. 16. the air all around us
  11. 17. small pieces
  12. 21. the building blocks of the universe