DATA+ANALYSIS

**//Look at your data and collaboratively analyse....//**
The table shows that as the distance of the light from the plant increased, the length of the bubble decreased. The length of the bubble increases when there is more gas produced by the elodea, meaning the longer the bubble, the higher the rate of photosynthesis. For example, when there was no distance between the beaker and the light, the gas had an average length of 12.6mm. When the distance of the light was increased to 50cm, the average length of the gas was decreased to 6.7mm.
 * Distance from the lamp (cm) + or - 0.5cm |||||||| Length of the bubble (mm) + or - 0.5mm ||
 * ^  || Trial 1 || Trial 2 || Trial 3 || Average ||
 * 0 || 12 || 13 || 13 || 12.6 ||
 * 10 || 11 || 13 || 11 || 11.7 ||
 * 20 || 11 || 13 || 12 || 12 ||
 * 30 || 10 || 11 || 11 || 10.7 ||
 * 40 || 8 || 7 || 8 || 7.7 ||
 * 50 || 7 || 6 || 7 || 6.7 ||

However, the results showed that the rate of photosynthesis did not increase steadily with the increase in distance. In distance 20cm, there is an anomaly. The rate of photosynthesis is higher than at 10cm distance.

There is a negative correlation between the amount of gas produced by the plant and its distance from the light source, which means that the rate of photosynthesis decreases as the light intensity decreases too.

The nearer the lamp to the beaker containing Elodea, the rate of oxygen produced increases, which indicates a higher rate of photosynthesis (and vice versa). Therefore, it can also be concluded that light is a limiting factor of photosynthesis in Elodea.

However, there my have been some inaccuracies in the results which are examined below.