Explain why you needed to leave the apparatus in a light place
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to destarch the leaves
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Set up the apparatus as in the diagram.
Leave for five minutes for the pondweed to acclimatise to the new light intensity.
Count the number of bubbles given off in one minute.
Move the light 10 cm further back.
Leave for five minutes for the pondweed to acclimatise again.
Count the number of bubbles given off in one minute.
Repeat by moving the lamp away by 10 cm intervals until 50 cm is reached.
A lamp is moved away from a beaker containing pondweed, by 10 cm intervals up to 50 cm along a ruler, in an experiment to investigate light intensity on the rate of photosynthesis.
Set up the apparatus as in the diagram.
Leave for five minutes for the pondweed to acclimatise to the new light intensity.
Count the number of bubbles given off in one minute.
Move the light 10 cm further back.
Leave for five minutes for the pondweed to acclimatise again.
Count the number of bubbles given off in one minute.
Repeat by moving the lamp away by 10 cm intervals until 50 cm is reached.
A lamp is moved away from a beaker containing pondweed, by 10 cm intervals up to 50 cm along a ruler, in an experiment to investigate light intensity on the rate of photosynthesis.
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