Below is a table of results obtained by a year 10 student who was looking at how different light intensity affected the rate of photosynthesis in two different types of plant.
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Light Intensity (Lux) |
Photosynthesis Rate (Photosynthetic Unit) |
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| Plant Type A | Plant Type B | |
| 10 | 5 | 5 |
| 20 | 9 | 29 |
| 30 | 16 | 41 |
| 40 | 23 | 49 |
| 50 | 32 | 54 |
| 60 | 42 | 58 |
| 70 | 55 | 60 |
| 80 | 72 | 60 |
| a) |
Draw line graphs for the above data on the grid below. Remember to give the graph a key, and scales for both axis.
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| b) |
What was the rate of photosynthesis for Plant Type B when the light intensity was 45 lux? _______
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| c) |
On your graph, draw and label a line for plant type C. Plant type C has a lower rate of photosynthesis than Plant Type A for light intensities up to 40 lux. Above 40 lux, Plant Type C has a faster rate.
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| d) |
Why is Plant Type B more likely to live on a forest floor with little light?
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