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A brief summary of how the intensity of light affects the rate of photosynthesis
Effect of light on photosynthesis
A brief summary of how the intensity of light affects the rate of photosynthesis
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Investigating Whether Light Intensity Affects Photosynthesis
Background Information:
Photosynthesis means “making through light” and occurs in the cells of
green plants, which are exposed to light.
The word equation for photosynthesis is:
Light
[IMAGE]Carbon Dioxide + Water Glucose + Oxygen
Chlorophyll
Although most of the glucose produced is converted into insoluble
starch for storage in the stem, leaves or roots, some is used
immediately by the plant to provide via respiration.
There are three things which limit the rate of photosynthesis, which
are temperature, carbon dioxide concentration and light intensity.
This is shown as when the temperature, carbon dioxide concentration
and light intensity increases, so does the rate of photosynthesis.
Prediction:
I think that at high light intensity the rate of photosynthesis will
increase because, as shown in my background information, as light
intensity increases, so does the rate of photosynthesis. I also think
at low light intensity the rate of photosynthesis will decrease. I
think this because, as proven in my background information, light is
needed for photosynthesis and means “making through light”.
Above is a graph to show what I predict my results will show about the
rate of photosynthesis as the light intensity increases. I think as
the light intensity increases the rate of photosynthesis will increase
because, as shown in my background information light is need to
photosynthesize.
I think eventually the graph will level out because the light
intensity will not be bale to increase anymore.
Preliminary work:
Below is a table showing our results after completing our preliminary
test.
Distance the light is from beaker (cm)
Bubble produced per minute
25
6
20
13
15
17
10
19
5
21
0
23
Using these results I can work out what I am going to use. Below is a
list:
at the small end of the axis to see a more reliable pattern. I could
1. In response to light, phytochrome undergoes a change in shape that leads to the activation of
household we use a mixture of these models. I also performed a research and found a website
An Analysis and Evaluation of Data from Photosynthesis Experiments Graph analysis This is my analysis for the investigation in to the affect of light intensity on the rate of photosynthesis to the Canadian pondweed, elodea. In the results the pattern is that when the light intensity is higher the readings are generally higher. On the graph the less the light intensity the lower the gradient of the curve. the equation for the photosynthesis process is; CO2 + 2H2O + Light Energy = =
To make the test fair I will use the same amount of water and the leaf
Without carbon dioxide plants cannot photosynthesize. Through reading various books and web pages it was made clear that carbon dioxide is definitely one of the raw materials needed for photosynthesis, but I wanted to see whether this is actually true and if carbon dioxide is taken away completely will the plant photosynthesize at all? By taking a two plants of the exact same species, de-starching them both followed by putting plant one in conditions where carbon dioxide is taken away completely, and plant two will then be put in conditions where carbon dioxide is added, after a day or two in these conditions leaves from both plants will be tested for starch, if the leaf tests positive for starch it means that the plant has photosynthesized, if the leaf tests negatively for starch it means that the plant has not photosynthesized at all. The aim of my experiment is to see whether carbon dioxide is really necessary for photosynthesis, and to see if a plant can photosynthesize at all with no carbon dioxide present in its environment even when it is still exposed to all the other factors that are too needed for photosynthesis.
Above is my original data. In the graph, it can be seen that there are
An Investigation into the Effect of Light Intensity on the Rate of Photosynthesis on a Piece of Elodea
* Count the number of bubbles seen in 1 minute which is a way of
The results from the gel electrophoresis were inconclusive so students selected their genotype, with the results shown in Table 1. The controls were successful with the (+/+) homozygous, (-/-) homozygous, and heterozygous lanes having bands at 941, 641, and both 941 and 641 respectively. The class allelic frequencies were 56.3% for p and 43.8% for q, indicating that slightly more individuals had the Alu insert on their chromosomes (Table 2). When the Hardy-Weinberg equation was applied, there were some discrepancies as shown by Table 3 between the observed and calculated frequencies. The p frequency was observed at 10% higher than Hardy-Weinberg while the q frequency was observed at 10% lower.
Photosynthesis is one of the most important biological processes in life. In a very broad view, it takes carbon dioxide and converts it to oxygen to release in the environment. Photosynthesis goes through two stages: photochemical and biochemical. Photochemical reactions are dependent on light and capture energy. The objective of the experiment is to observe the rate of photochemical reactions with different light intensities and light wavelengths.
I'm going to investigate the amount of light used in photosynthisis to see if it
Light is a very important factor in the rate of photosynthesis, in my project I am going to test that plants do need light in order to photosynthesise. It will be very interesting to see how light will influence the rate of photosynthesis in plants and what will happen if they do not get the required light in order to produce starch .