Safety in the lab

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Across
  1. 2. has three legs and used to place vessels being heated
  2. 4. should be cleaned up immediately
  3. 5. value that is important to scientists
  4. 6. corrosive
  5. 7. sign seen at a gas station
  6. 8. causes eyes to burn
  7. 9. verbal or written directions which must be followed
  8. 12. used to carefully pour liquid into narrow vessel
Down
  1. 1. may produce explosive substance
  2. 3. insecticide
  3. 6. test tube, thermometer, beaker are all _____
  4. 10. not permitted in lab as student may become ill
  5. 11. explodes when heated