lab safety

• safety precautions for bunsen burner

  • protect eyes by wearing goggles
  • tie up hair to avoid it catching fire
  • roll up sleeves to avoid clothes set on fire
• parts of the bunsen burner

  • air hole
  • barrel
  • base
  • gas supply
  • regulating collar
• closed air hole = quiet yellow flame (not used for heating)
• half opened air hole = medium blue flame (for heating)
• fully open air hole = noisy blue flame
• independent variable = changed variable
• dependent variable = measured variable
• controlled variable = kept equal at all times
• hypothesis

  highly educated explanation on what the result will be