Required Practical: Photosynthesis Rate (OCR GCSE Biology A, Combined (Gateway Science Suite)): Flashcards
📚Flashcards
Practise the cards
15 cards from this deck
ShowHide
Practise the cards
15 cards from this deck
Aim of this photosynthesis practical
Aim of this photosynthesis practical
How factors affect rate of photosynthesis
What is measured to determine photosynthesis rate
What is measured to determine photosynthesis rate
Amount of oxygen produced
Example aquatic plant used in this practical
Example aquatic plant used in this practical
Pondweed (e.g., Elodea)
Purpose of sodium hydrogen carbonate solution
Purpose of sodium hydrogen carbonate solution
To increase/provide consistent CO₂ concentration
How oxygen production is measured in this practical
How oxygen production is measured in this practical
Distance the oxygen bubble travels in capillary tube
Example time period for measuring bubble movement
Example time period for measuring bubble movement
5 minutes
How to vary light intensity in this experiment
How to vary light intensity in this experiment
Move lamp closer or further from test tube
How to vary temperature in this experiment
How to vary temperature in this experiment
Use a water bath to control temperature
How to vary CO₂ concentration in this experiment
How to vary CO₂ concentration in this experiment
Adjust amount of sodium hydrogen carbonate
What variables to keep constant during testing
What variables to keep constant during testing
All factors except the one being tested
Effect of increasing light intensity on rate
Effect of increasing light intensity on rate
Rate increases then levels off (limiting factor)
Effect of temperature on photosynthesis rate
Effect of temperature on photosynthesis rate
Increases to optimum, then decreases
Why rate decreases after optimum temperature
Why rate decreases after optimum temperature
Enzymes denature
Effect of increasing CO₂ on photosynthesis rate
Effect of increasing CO₂ on photosynthesis rate
Rate increases until another factor becomes limiting
What this experiment helps identify
What this experiment helps identify
Which factor is limiting photosynthesis rate