Science 9 Crossword

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Across
  1. 2. an educated guess
  2. 10. one of the four safety rules
  3. 12. proper face to smell a substance
  4. 15. what you measure in the experiment and what is affected during the experiment
  5. 16. causes burns to skin, eyes, lungs, clothes and metal.
  6. 19. may cause it's container to explode if heated or dropped
  7. 20. A circle containing a skull and crossbones is the WHMIS symbol for?
  8. 22. a substance that burns at room temperature or burns if heated above room temperature
  9. 23. a substance that gives off oxygen to help other substances burn
  10. 24. Workplace hazardous materials information system
Down
  1. 1. can burn or explode if heated
  2. 3. a variable that is manipulated to determine the value of a dependent variable
  3. 4. materials caising toxic effects
  4. 5. any infectious materials including blood,urine and saliva
  5. 6. always use a _____ to clean up broken glass
  6. 7. remember to do this when you have finish your lab
  7. 8. put it over someone if a part of their body catches on fire.
  8. 9. any part of the experiment that is subjet to change
  9. 11. this part of your lab requires a god deal of thinking and writing and should be at least half a page
  10. 13. where you state the objectives for the lab
  11. 14. a danger or risk
  12. 17. A circle containing a flaming “O” is the WHMIS symbol for?
  13. 18. should always be worn while doing a lab
  14. 21. something that is not being tested, for it's being used in comparison