Investigating plant growth responses (Edexcel GCSE Biology): Flashcards
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Aim of seedling growth experiment
Aim of seedling growth experiment
Effect of light intensity on newly germinated seedlings
Definition of etiolation
Definition of etiolation
Elongated, weak growth due to lack of light
Seeds per petri dish
Seeds per petri dish
10 mustard or cress seeds
Type of seeds used
Type of seeds used
Mustard or cress seeds
Independent variable
Independent variable
Light intensity (full, partial, darkness)
Dependent variable measured
Dependent variable measured
Height of seedlings in mm
Duration of experiment
Duration of experiment
One week with daily measurements
Control variables
Control variables
No. of seeds, type, water vol., temp, duration
Growth result in full light
Growth result in full light
Healthy, compact growth
Growth result in darkness
Growth result in darkness
Elongated, weak growth (etiolation)
Growth result in partial light
Growth result in partial light
Moderate growth
X-axis on growth graph
X-axis on growth graph
Time (days)
Y-axis on growth graph
Y-axis on growth graph
Mean seedling height