Unit 8

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Across
  1. 1. personal alert safety system
  2. 4. related to breathing and the lungs
  3. 5. don't pass the ______ of no return
  4. 8. a heads up display
  5. 10. a(usually bad) gas emitted from something
  6. 11. another word for oxygen tanks
  7. 12. poisonous to living things
Down
  1. 2. self-contained breathing apparatus
  2. 3. a system giving constant oxygen
  3. 6. containing low levels of oxygen
  4. 7. a strap that attaches something to you
  5. 9. a SCBA system that makes your voice loud