Photosynthesis (AQA GCSE Biology): Flashcards
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Practise the cards
13 cards from this deck
What measurement indicates photosynthesis rate?
What measurement indicates photosynthesis rate?
Oxygen produced
Three factors affecting photosynthesis rate
Three factors affecting photosynthesis rate
Light intensity, CO₂ concentration, temperature
Aquatic plant used in photosynthesis practical
Aquatic plant used in photosynthesis practical
Pondweed (e.g., Elodea)
Purpose of sodium hydrogen carbonate in experiment
Purpose of sodium hydrogen carbonate in experiment
Provides CO₂ source (increases concentration)
Where oxygen collects during the experiment
Where oxygen collects during the experiment
Gas bubble in capillary tube
What bubble distance indicates in experiment
What bubble distance indicates in experiment
Volume of oxygen produced (rate of photosynthesis)
Time period for measuring bubble movement
Time period for measuring bubble movement
5 minutes
How to vary light intensity in experiment
How to vary light intensity in experiment
Move lamp closer or further from test tube
How to control temperature in experiment
How to control temperature in experiment
Use a water bath
Pattern: light intensity vs photosynthesis rate
Pattern: light intensity vs photosynthesis rate
Increases, then levels off due to limiting factor
Pattern: temperature vs photosynthesis rate
Pattern: temperature vs photosynthesis rate
Increases to optimum, then decreases (enzymes denature)
Pattern: CO₂ concentration vs photosynthesis rate
Pattern: CO₂ concentration vs photosynthesis rate
Increases until another factor becomes limiting
Application of understanding photosynthesis factors
Application of understanding photosynthesis factors
Optimising plant growth in greenhouses