Hazards & Drawing a Graph

• These are the stuff you should always look out for when experiment planning, hazards are not much but they will still get you the point:

  • Cutting with a knife may injure hand; cut on a surface and away from hand gloves
  • H202 is corrosive; use gloves and goggles while handling it
  • While exhaling through a tube into e.g. lime water, there is a risk of lime water being swallowed
  • Iodine solution can stain clothes, ensure gloves and safety goggles are worn.
• Drawing Graphs

  ● Use a sharp pencil

  ● Label both axes with units (IV on the x-axis, DV on the y-axis)

  ● Labels should be in the form “quantity/units”

  ● Choose the appropriate scale

  ● Use crosses “(×)” or “⊙” to mark the data points (for scatter graphs)

  ● Graph should cover at least half the grid

  ● Draw a line of best fit that can fit through most of the points as possible

  (for scatter graphs)

  ● Join the points (for line graph)