rate of photosythesis
The purpose of this experiment was to compare how the rate of photosynthesis varies depending on light intensity. By definition photosynthesis is a process that converts light energy into chemical energy that are stored in the bonds of a carbohydrate. The main item photosynthesis needs is light and without light the process cannot happen. Almost all living organisms need the sugar that is produced by photosynthesis to be used as energy. The oxygen that this process releases is used for most organisms during cellular respiration. Plants, for example, which are eurokayto are such organisms that live by photosynthesis. In plants chloroplasts are the membrane bound organelles where the process takes place. Within the organelles are stacks of membranes sacks called grana. The individual sacks in grana are called thylakoids, which hold pigments that are needed to get the light that is used in photosynthesis. The most part in the thylakoids is chlorophyll. Chlorophyll is what captures the light. It is responsible for absorbing all the colors. Photosynthesis has two stages that it can be in. Light dependent reactions are considered the first stage and takes place in the thylakoid membranes. In this stage light is the energ
y that helps make ATP, which is used, in the second stage. The second stage is light independent reaction and takes place in the stroma of chloroplasts. In this stage things such as ATP reaction with light and is converted into carbon dioxide. This process, the process of converting carbon dioxide into organic compounds is carbon fixation. To start off with our null hypothesis was light intensity does not have an affect on the rate of photosynthesis. Our alternative hypothesis was light intensity does have an affect on the rate of photosynthesis. For our first recording we measured the experimental tube’s line had moved 8mm and the control had moved 3mm. Our second recording showed that the experimental line moved 13mm from the start and the control’s had moved 7mm. The next reading the experimental line moved 17mm and the control’ had moved 11mm. The last reading that my group recorded is where we then decide that our experimental had failed. The experimental line remained the same as it was in our third reading. Since our data was wrong we used the average of the two experiments from group two’s as shown in figure 1. Their experimental tube, where the lamp was 75cm from the tubes, had a movement of the line to be 12mm. In their second experiment, in which the lamp was only 25c
Some topics in this essay:
Materials Methods,
,
light intensity,
rate photosynthesis,
light intensity affect,
intensity affect rate,
affect rate photosynthesis,
hypothesis light intensity,
hypothesis light,
experimental line,
intensity affect,
affect rate,
line moved,
null hypothesis,
experiment failed,
mark line,
null hypothesis light,
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Approximate Word count = 874
Approximate Pages = 3 (250 words per page double spaced)
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