Investigating the effect of light intensityon photosynthesis rate (Edexcel GCSE Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What are the products of photosynthesis?
What are the products of photosynthesis?
Glucose and oxygen
What volume of sodium hydrogen carbonate solution is used in the boiling tube?
What volume of sodium hydrogen carbonate solution is used in the boiling tube?
45 cm³
What length should the Cabomba pondweed be cut to?
What length should the Cabomba pondweed be cut to?
8 cm
How should the pondweed be positioned in the boiling tube?
How should the pondweed be positioned in the boiling tube?
Cut end facing upwards
What is the initial distance between the pondweed and the light source?
What is the initial distance between the pondweed and the light source?
10 cm
How long should the apparatus stand before counting bubbles?
How long should the apparatus stand before counting bubbles?
Five minutes
Over what time period are the oxygen bubbles counted?
Over what time period are the oxygen bubbles counted?
One minute
How many times is the bubble count repeated at each distance?
How many times is the bubble count repeated at each distance?
Five times
What should be plotted on the x-axis of the graph?
What should be plotted on the x-axis of the graph?
Distance from light source
What happens to photosynthesis rate as distance from the light increases?
What happens to photosynthesis rate as distance from the light increases?
It decreases
What is the independent variable in this experiment?
What is the independent variable in this experiment?
Distance from light source
Which should be kept constant as a control variable?
Which should be kept constant as a control variable?
Concentration of NaHCO₃ solution