The nature of science

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Across
  1. 4. Artificial sweetener used in diet drinks
  2. 6. Is something morally right or wrong?
  3. 8. Data that is in the form of numbers or measurements
  4. 10. Burner used to heat materials
  5. 14. Looking after the earth
  6. 15. Name of a flask used for measuring liquids
  7. 16. A scientist that studies Living things
  8. 17. This is an idea, that has been proven
  9. 19. The study of space and space objects
  10. 22. The study of living things and their environment
  11. 23. Instrument used to measure temperature
  12. 24. Reduce, Reuse, _________
  13. 25. How close the results are to the real value
  14. 27. Factors in an experiment that can change
  15. 28. Another word for 'living thing'
  16. 29. ________ source of evidence from journals or books
Down
  1. 1. A chemical that goes on fire easily
  2. 2. Developed to prevent diseases caused by viruses
  3. 3. How close the results are to each other
  4. 5. A scientist might carry out one of these to research
  5. 7. Diabetics need this, they get it from injections
  6. 9. Type of energy, collected using turbines
  7. 11. Data obtained from observing e.g. colour
  8. 12. Favoring one side of the argument
  9. 13. Used to measure small amounts of liquids accurately
  10. 18. The original idea of a scientist that needs to be proven
  11. 20. A way of collecting data from sources such as books and the internet
  12. 21. Used to observe experiments that cannot be carried out in the real world
  13. 26. The study of matter and it's composition