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Mustard Seed Germination and Photosynthesis Investigation

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Obtaining Evidence Coursework - Mustard Seed Germination and Photosynthesis Photosynthesis Equation: Carbon dioxide + water glucose + oxygen CO2 + 2H2A + light energy � (CH2) + H2O + A2 The complete, balanced equation for photosynthesis in which water serves as the electron donor is: In photosynthesis, plants take carbon dioxide from the air and water from the soil, and use the energy from sunlight to convert them into food. The first food they make is glucose but that can be later changed into other food types. Oxygen is also produced in photosynthesis and although some is used inside the plant for respiration most is not needed and is given out. The sunlight is absorbed by chlorophyll in mainly the leaves. Aim The experiment I did was done to learn about the effects of light source on germination and photosynthesis. ...read more.


followed lastly by the ones with light from directly above (3). Although the shortest batch I believe batch 3 was the healthiest followed by 2 then lastly 1. I judged this by looking at the greenness of the plant. There were a few anomalies results such as number 5 in the in a cupboard batch (8.2cm). This was quite larger compared to the other shoots in the same batch. I calculated the average of all 3 batches in the hope of eliminating flukes. I also chose to take 10 measurements for each batch so I would have a wider range of results to study and to allow me to gather a more accurate average. I have plenty of data and the experiment was an overall success. If I had time I could repeat the whole experiment again in the same way as it was done before in order to compare my 2 sets of results. ...read more.


I believe this is not the best way to do this. An improvement could be an opaque box with one side open to an artificial light source or a real one if possible. The batch in direct top light and side light received differently light sources. The directly above light was created using artificial light whereas the light from the side was natural. To improve the experiment and make it a fair test all the light sources should be either natural or artificial. In a Cupboard (cm) Light from Side (cm) Light from directly above (cm) 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 2.3 5.7 6.2 4.2 8.2 4.6 4.7 3.2 2.1 4.3 2.3 1.7 2.5 2.6 3.1 6 7 8 9 10 6 7 8 9 10 6 7 8 9 10 6.1 4.7 5.2 2.1 6.2 3.2 3.4 4.0 3.7 2.9 3.2 2.1 2.4 2.3 2.6 Results Average (cm) Average (cm) Average (cm) 5.09 3.61 2.48 ...read more.

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