Graphs:

• Use a sensible scale so plotted points cover ½ a page
• May have negative numbers – make sure the scale goes down
• Don’t need to start at zero – use a broken scale
• Label axes with measurement & units
• Plot carefully (± one small square)
  • Use a pencil!
• Line of best fit may be a straight line but look out for obvious curve
  • Use a long ruler (no kinks or double lines!)
  • Miss out anomalous results
  • May not go through origin
  • But it may!
• Readings from graph:
  • Use ruler & pencil to mark given value and show value read form the graph
  • Formula:
• If using formula they must be correct
• Know common hazards & precautions to minimise risks:
  • Flammable or explosive – keep away from naked flame
  • Corrosive – wear gloves/avoid contact with hands
  • Toxic – wear gloves
• Safety glasses & lab coats are assumed they will be ignored as an answer
• Anti-bumping granules prevent vigorous/uneven boiling – produce small bubbles