Disance of lamp from tube (cm) | 20 | 40 | 60 | 80 | 100 | 120 |
Number of bubbles per minute | 24 | 12 | 7 | 4 | 2 | 2 |
Answer:
(a)
Number of bubbles (per minute)
(b) The further away the light is from the plant, the lower the light
intensity. Light is needed for photosynthesis so less photosynthesis takes
place and fewer bubbles of oxygen gas are produced.
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