Required Practical: Photosynthesis Rate (AQA GCSE Biology): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What gas is measured to determine the rate of photosynthesis in this practical?
What gas is measured to determine the rate of photosynthesis in this practical?
Oxygen
Why is sodium hydrogen carbonate added to the water in this experiment?
Why is sodium hydrogen carbonate added to the water in this experiment?
To provide a consistent CO₂ source
How is oxygen production measured in this practical?
How is oxygen production measured in this practical?
Distance the gas bubble travels
What is the example time period given for measuring oxygen bubble movement?
What is the example time period given for measuring oxygen bubble movement?
5 minutes
The distance moved by the bubble is proportional to what?
The distance moved by the bubble is proportional to what?
Volume of oxygen produced
How can light intensity be varied in this experiment?
How can light intensity be varied in this experiment?
Move the lamp closer or further away
What apparatus is used to control temperature when investigating its effect?
What apparatus is used to control temperature when investigating its effect?
Water bath
When testing light intensity, which variables must be kept constant?
When testing light intensity, which variables must be kept constant?
Temperature and CO₂ concentration
What happens to photosynthesis rate as light intensity increases?
What happens to photosynthesis rate as light intensity increases?
Increases then levels off
Why does photosynthesis rate decrease at high temperatures?
Why does photosynthesis rate decrease at high temperatures?
Enzymes denature
What happens when carbon dioxide concentration increases in this experiment?
What happens when carbon dioxide concentration increases in this experiment?
Rate increases until another factor limits it
Where is understanding these factors particularly useful for optimizing plant growth?
Where is understanding these factors particularly useful for optimizing plant growth?
Greenhouses