Investigating photosynthesis (AQA GCSE Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
ShowHide
Practise the questions
12 questions from this quiz
Why are aquatic plants like pondweed used to investigate photosynthesis?
Why are aquatic plants like pondweed used to investigate photosynthesis?
They produce oxygen bubbles to count
What is the purpose of sodium hydrogen carbonate solution in this experiment?
What is the purpose of sodium hydrogen carbonate solution in this experiment?
To provide carbon dioxide
Why should you use an LED lamp instead of a regular bulb?
Why should you use an LED lamp instead of a regular bulb?
To avoid heating the pondweed
How do you calculate the mean from three repeated measurements?
How do you calculate the mean from three repeated measurements?
Add the 3 results and divide by 3
How many times should you count bubbles at each distance?
How many times should you count bubbles at each distance?
Three times
What should you count during the experiment?
What should you count during the experiment?
Bubbles produced in 1 minute
What should go on the horizontal axis of your graph?
What should go on the horizontal axis of your graph?
Distance (cm)
What pattern is observed as lamp distance increases?
What pattern is observed as lamp distance increases?
Fewer bubbles produced per minute
Why is it important to repeat measurements at each distance?
Why is it important to repeat measurements at each distance?
To ensure reliability
What distance should the lamp be positioned at first?
What distance should the lamp be positioned at first?
10 cm
What does a lower rate of bubble production indicate?
What does a lower rate of bubble production indicate?
Slower rate of photosynthesis
What percentage of the graph area should your plotted points fill?
What percentage of the graph area should your plotted points fill?
At least 50%