Science 9 Crossword

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