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:
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
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 = =
Investigating the Link Between Wavelength of Light and Rate of Photosynthesis PROBLEM = = = = =
To make sure that my test is fair I will make sure to keep all the
The Effect of Light Intensity on Photosynthesis Of Elodea Canadensis Introduction I wanted to find out how much the light intensity affected the Photosynthesis in Elodea Camadensa. I decided to do this by measuring the amount of oxygen created during photosynthesis. Photosynthesis is the procedure all plants go through to make food. This process uses Carbon dioxide, water and light energy. It produces Oxygen and Glucose.
Photosynthesis is a highly important process that takes place in plants primarily because without it life on this planet would not be able to function properly. “It produces the oxygen we breathe and the food we eat” (Harbinson). Without photosynthesis, life would not be able to sustain itself and our planet would be a barren wasteland. The Photosynthetic process converts light energy into chemical energy. The energy that’s created through the process then later is used to help fuel the organism’s activities. This process can be significantly more complicated than it sounds with different stages and many steps.
Introduction: Photosynthesis uses the sun’s energy and uses it to convert carbon dioxide and water into sugar. There were two plants that stayed outside in the sunlight and two plants that were inside only receiving sunlight from the window. If the plants stay outside then they will grow at a faster rate and will be the tallest with most leaves because they receive more sunlight from the sun and have a fresher environment. Methods: Both the plants inside and outside were exposed to sunlight and given water every day. Results: The plants inside grew more than the plants inside. The plants outside did not last all of the weeks the experiment was being conducted.
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.
This graph shows the result that I expect to get, I expect to see a
Then the ITS test is performed on the sample at 77°F (25°C) at a loading rate of 2in/min.