scientific method crossword

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Across
  1. 4. variable that does not change in an experiment
  2. 7. something you don't understand and you do an experiment to solve it
  3. 8. variable that scientists changes
  4. 9. used for protecting your eyes from chemicals and you must wear them in an experiment
  5. 10. scientific procedure done to make a discovery
Down
  1. 1. used to heat up liquids or solids in a beaker
  2. 2. idea you can test by doing an experiment
  3. 3. rounded body with narrow neck used for mixing liquids
  4. 5. variable scientists study this variable
  5. 6. used to find the mass of things