investigation to show effect of light on growth of seedlings

Cards (9)

  • measure heights of shoots
  •  leave some in dark with light from one side
  • control with all-round light or rotating in dark
  • control variable e.g. same temperature, water, soil type
  • after suitable time record appearance of seedlings
  • re-measure heights of shoots
  • use thread or straighten them out
  • calculate mean height increase for each group
  • use protractor to estimate angle of bending