Wait a second!
More handpicked essays just for you.
More handpicked essays just for you.
scientific research and data collection
Don’t take our word for it - see why 10 million students trust us with their essay needs.
Recommended: scientific research and data collection
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 ========> [CH2O} + O2 + H2O,
This shows that when the light intensity is increased the rate of
reaction will be more quicker he only anomalous result there was, is
the one in the 100 watt result the reading after 5 minutes is
anomalous because it does not follow the predicted pattern of
increasing in the production of gas because it is lower
I know from my own knowledge of photosynthesise that when the light
intensity is increased the rate of reaction will be more quicker
because many plants and trees photosynthesise quicker in stronger
light and photosynthesise slower in dimly lit places. The chlorophyll
absorbs light energy and enables it to be used by the plant for
building up sugar. The overall effect is that energy is transferred
from sunlight to sugar molecules. The energy inside molecules is
called chemical energy, so light energy is converted into chemical
energy by the chlorophyll.
I believe that the results are reliable enough to support the
hypothesis, because the graph of results proves the hypothesis because
the gradient of the curve increases with the increase of the light
intensity. I think that the method used is reliable enough to support
the prediction. Overall, both graphs and my results support my
predictions fully. My idea that the rate of photosynthesis would
increase with light intensity was comprehensively backed up by my
results.
Evaluation
I think that the method used in the experiment is not very accurate
because the way we measure the amount of gas produced is not very
Investigating the Effect of Light Intensity on Photosynthesis in a Pondweed Aim: To investigate how the rate of photosynthesis changes at different light intensities, with a pondweed. Prediction: I predict that the oxygen bubbles will decrease when the lamp is further away from the measuring cylinder, because light intensity is a factor of photosynthesis. The plant may stop photosynthesising when the pondweed is at the furthest distance from the lamp (8cm). Without light, the plant will stop the photosynthesising process, because, light is a limited factor. However once a particular light intensity is reached the rate of photosynthesis stays constant, even if the light intensity is the greatest.
at the small end of the axis to see a more reliable pattern. I could
This shows that there could be three variables in this experiment, carbon dioxide, water and light energy. So in our case the variable light energy (light intensity) will be used. The equation also shows that if there is more light energy then more glucose and oxygen will be produced.
Investigation Into the Colour of Light Needed to Start a Photosynthesis Reaction Diagrams [IMAGE] Method The apparatus for this experiment will be setup as shown in the diagram, for all the experiments the coloured filter will be 5cm away from the white light bulb, which is a 60watt bulb, and the beaker will be 20cm away from the edge of the coloured filter. Just before the experiment takes place we will place the pond weed (which has been in darkness for at least 24 hours to stop it any photosynthesis) into the beaker. I will then place the funnel over the pond weed and place the test-tube into the beaker (like the diagram above) I will then fill the beaker up with cold tap water till it covers the bottom of the test tube (450ml).
The Effect of Light Intensity on the Rate of Oxygen Production in a Plant While Photosynthesis is Taking Place
Photosynthesis is the process where plants transform light energy usually from sunlight into chemical energy and its balanced equation is 6CO2 + 6H2O –light energy----> C6H12O6 + 6O2 (Elsevier B.V.,LiveScience). Photosynthesis has major byproducts including water, glucose and starch(which is produced in the plant), and last but not least; oxygen. There are numerous amounts of plants all around the world producing CO2 necessary for human survival. However, the photosynthesis cycle is not visible which results in the plants appearing like they are not doing anything. One way to clearly prove that plants are indeed performing photosynthesis is to observe the plants giving off oxygen; which is one of the most important results of
Investigating the Link Between Wavelength of Light and Rate of Photosynthesis PROBLEM = = = = =
To make the test fair I will use the same amount of water and the leaf
To make sure that my test is fair I will make sure to keep all the
The Effect of Light Intensity on the Rate of Photosynthesis in an Aquatic Plant Introduction The input variable I will be investigating is light, as light is just one of the 4 factors required in the green-plant process of photosynthesis. Photosynthesis is the process by which green-plants use sunlight, carbon dioxide, water & chlorophyll to produce their own food source. This process is also affected by the temperature surrounding the plant (the species of plant we experimented with, pond weed, photosynthesised best at around 20 degrees centigrade.) Light, temperature & CO2 are known as limiting factors, and each is as important as the next in photosynthesis. Light is the factor that is linked with chlorophyll, a green pigment stored in chloroplasts found in the palisade cells, in the upper layer of leaves.
Photosynthesis is a series of light driven reactions that convert energy poor compounds such as carbon dioxide and water to energy rich sugars [1] such as glucose. The process generate an electron gradient across the membrane of a chloroplast, which is used for ATP synthesis, and simultaneously produces electrons used to make NADPH, using NADP+ as an energy carrier[2]. Crudely put, it is the method by which autotrophic plants make their own ‘food.’
* Count the number of bubbles seen in 1 minute which is a way of
An Experiment to Investigate the Effect of Light Intensity on the Rate of Photosynthesis. Introduction Photosynthetics take place in the chloroplasts of green plant cells. It can produce simple sugars using carbon dioxide and water causing the release of sugar and oxygen. The chemical equation of photosynthesis is: [ IMAGE ] 6CO 2 + 6H20 C 6 H12 O 6 + 6O2 It has been proven many times that plants need light to be able to photosynthesize, so you can say that without light the plant would neither photosynthesize nor survive.
Experiment #1: The purpose of this experiment is to investigate the effects of baking soda and light intensity on the rate of photosynthesis of green spinach leave through the observation of floating disk.
The Effect of Wavelength on Photosynthesis Rate Aim: To be able to To investigate how different wavelengths (colors) of light affect the photosynthetic rate of the synthetic. I will use a pant that is a pond weed called elodea. I will measure the rate of photosynthesis by measuring the amount of o2 given off in bubbles per minute from the elodea. I will do this by placing the Elodea in a test tube with sodium hydrogen. carbonate then I will vary the light wavelength (color) using colored.