Required practical - Investigating photosynthesis (AQA GCSE Biology Combined Science): Quizzes
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Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does this practical investigate?
What does this practical investigate?
How light intensity affects photosynthesis
How is the rate of photosynthesis measured in this practical?
How is the rate of photosynthesis measured in this practical?
By counting oxygen bubbles produced
Why is sodium hydrogen carbonate solution added?
Why is sodium hydrogen carbonate solution added?
To provide carbon dioxide
What distance should the lamp start at?
What distance should the lamp start at?
10 cm
Why should you use an LED lamp?
Why should you use an LED lamp?
To avoid heating the water
How should the pondweed be positioned?
How should the pondweed be positioned?
Cut end pointing upward
How long should you wait after moving the lamp before counting bubbles?
How long should you wait after moving the lamp before counting bubbles?
5 minutes
How many times should you count bubbles at each distance?
How many times should you count bubbles at each distance?
3 times
If bubble counts are 25, 23 and 27, what is the mean?
If bubble counts are 25, 23 and 27, what is the mean?
25 bubbles per minute
What happens as the lamp moves further away?
What happens as the lamp moves further away?
Fewer oxygen bubbles are produced