Essay PreviewMore ↓
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.
[IMAGE]Carbon dioxide + water Light Energy glucose + oxygen
[IMAGE]6CO2 + 6H20 Light Energy C6 H12 O6 + 6O 2
Photosynthesis occurs in the leaves of the plant in the palisade
layer. Chlorophyll in the cells in the palisade layer absorb light for
photosynthesis. The plant releases the oxygen created in
photosynthesis back into the air but it uses or stores the glucose for
energy, respiration, growth and repair.
The leaves and plants are also specially adapted for photosynthesis in
their structure and cell alignment.
* Piece of Elodea Canadensis
* Test tube
* Two electrical wires
I put a piece of Elodea Canadensis (pond weed) in a test tube and
covered it with water.
The test tube was then placed in a beaker with a thermometer so that
the water stayed the same temperature, this was then placed in a
cardboard box with a bulb attached to a voltmeter by the electrical
wires so that I could concentrate how much light the plant got.
I varied the voltage (intensity) of the bulb and counted how many
bubbles of oxygen were created at each voltage in one minute.
I tested each voltage three times for accuracy for a minute each time.
Amount of bubbles
Light intensity (lux)
How to Cite this Page
"The Effect of Light Intensity on Photosynthesis Of Elodea Canadensis." 123HelpMe.com. 25 Jan 2020
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- The Effect of Light Intensity on the Rate of Photosynthesis Experiment: An experiment to investigate the effect of light intensity on the rate of photosynthsis. Aim: We will be trying to see if light intensity has an effect on the rate of photosynthsis. Introduction: Photosynthesis is the process that produces 'food' for plants, this 'food' is called glucose. The process takes place in the leaves of green plants, this is what the leaves are for. There are four things that are required by the plant before it can carry out photosynthesis, they are light, chlorophyll, carbon dioxide and water .... [tags: Papers]
441 words (1.3 pages)
- The Effect of Light Intensity on the Rate of Photosynthesis Introduction Green plants don't exude food from the soil they make their own, using sunlight. This is called photosynthesis, which means "making through light". This occurs in the cells of a green plant, which are exposed to sunlight. Four things are needed to make this process work and this gives two thing: the four things needed are light from the sun, carbon dioxide diffuses from the air, water from the soil and chlorophyll in the leaves.... [tags: Papers]
1311 words (3.7 pages)
- Determining the Effect of Light Intensity on Photosynthesis Aim In this experiment, I intend to alter the light intensity and measure its effect on photosynthesis through the production of oxygen Introduction Photosynthesis is the process by which green plants provide a source of energy for respiration. The formula is as follows- Carbon dioxide + water Carbon dioxide and water are chemically combined to produce glucose (the energy source) and oxygen (a waste product).... [tags: Papers]
1671 words (4.8 pages)
- The Effect of Light Intensity on the Rate of Photosynthesis Plan: Aim: To investigate the affect of light intensity on the rate of photosynthesis. Theory: Before I predict what will happen I must look at how photosynthesis occurs. Photosynthesis is the way plants create a source of food for themselves. Photosynthesis requires the following resources; Carbon Dioxide, Water and light. Inside the leaves of a plant there is a green substance, this substance is known as chlorophyll.... [tags: Papers]
531 words (1.5 pages)
- The Limiting Effect of Light Intensity on Photosynthesis Aim: To investigate the limiting effect of light intensity on photosynthesis. Prediction: I predict that as the light source (desk lamp) is moved closer to the pondweed (Elodea), the rate of photosynthesis will increase therefore more oxygen will be produced creating more bubbles. I believe this will happen because when the light source is nearer to the plant more of the plants surface area is coming in to contact with the light from the desk lamp therefore more photosynthesis will occur which will mean more oxygen will be produced which will create more bubbles.... [tags: Papers]
613 words (1.8 pages)
- Effect of Light Intensity on Photosynthesis in Elodea Prediction I predict that as the light intensity doubles the number of bubbles produced per minute will double Results ======= Distance from beaker (cm) Light Intensity Number of bubbles Produced Per Minute Repeat 1 Repeat 2 Repeat 3 100 0.01 9 10 10 75 0.02 16 17 15 50 0.04 25 21 23 30 0.1 32 50 44 20 0.3 46 21 47 15 0.4 92 90 88 10 1 104 90 94 9 1.2 111 102 96 Conclusion ========== Figure 1 shows that repeat 1 rises ste... [tags: Papers]
420 words (1.2 pages)
- 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 photosynthes... [tags: Papers]
4194 words (12 pages)
- An Experiment to Investigate the Effect of Light Intensity on the Rate of Photosynthesis Introduction Photosynthetic takes 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]6CO2 + 6H20 C6 H12 O6 + 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 or survive.... [tags: Papers]
970 words (2.8 pages)
- 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. [IMAGE]Carbon dioxide + water Light Energy glucose + oxygen Chlorophyll [IMAGE]6CO2 + 6H20 Light Energy C6 H12 O6 + 6O 2 Chlorophyll Photosynthesis occurs in the leaves of the plant in the palisade layer.... [tags: Papers]
991 words (2.8 pages)
- 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.... [tags: Papers]
1053 words (3 pages)
The table shows us that more oxygen was created at a higher light
intensity. I think that this experiment was not very reliable as the
way of counting the amount of oxygen was not reliable at all. If I was
to improve the experiment I would change the apparatus I used so that
I could measure the amount of oxygen given off accurately.
I would also test more voltages of light to widen the results of the
experiment, thus creating a clearer picture of how the light intensity
is affecting the plant. The preliminary experiment is unreliable due
to the simplicity of it.
I predict that the rate of photosynthesis will increase until other
limiting factors run out.
Limiting factors are:
* Carbon Dioxide
* Amount of water
* Light Intensity
If we run out of Carbon dioxide, water or light photosynthesis cannot
take place. Also if the temperature is too high or too low
photosynthesis cannot take place either.
I believe my prediction to be correct as plants need sunlight to
photosynthesise. So if the light intensity increases so should the
rate of photosynthesis. If you look at a plants leaves surface area
and position on the stem you see that it is trying to get more light.
This shows us that the more light a plant gets the more it will
photosynthesise this all depends on the limiting factors. I will vary
the light intensity in the experiment. But I will control the amount
of water and temperature so that they are always the same.
* Test tube
* Piece of Elodea Canadensis
* Capillary tube
* Two electrical wires
* Clamp stand
I will, for safety reasons, keep all water away from the electrical
equipment and the bulb.
I will place the piece of Elodea Canadensis and place it in the
syringe. Attach the capillary tube to the end of the syringe and fill
Place the syringe in a clamp stand and place the end of the capillary
tube in an empty beaker, this will then be placed in the cardboard
box. I will draw up some oxygen, using the syringe plunger, into the
capillary tube to about half way up, I will then mark where this comes
to with a pen on the capillary tube.
I will turn the bulb on by attaching it to the voltmeter by the
I will vary the voltage of the bulb timing each volt for one minute. I
will mark the new position of the oxygen in the capillary tube and
measure how far it has moved down the tube. I will use this
measurement to calculate the amount of oxygen in mm2.
Amount of oxygen (mm³ )
Light Intensity (lux)
I think that this experiment is much more accurate than the
preliminary experiment, due to the fact that the preliminary
experiment was very simple.
It shows that the higher the light intensity is the more oxygen is
produced. I do have a couple of anomalies which I believe to have
occurred because the experiment was run over two separate lessons, so
the pond weed/equipment was different in each lesson. Some examples of
these anomalies are volts 4, 5 and 8.
Otherwise I think that this experiment is more reliable and gives us a
clearer picture than the preliminary experiment.
I have realised in this experiment that without the products of
photosynthesis all living organisms would die, including plants as
eventually the limiting factors would run out such as carbon dioxide.
Both these experiments tell us how much oxygen is produced during
photosynthesis by using similar but different methods. Both
experiments came up with valuable results even though neither where
completely accurate. The improved experiment results showed a wider
range of volts and accuracy therefore being the more reliable source
I think that there must be a more reliable way of doing these
experiments but with the equipment and time we had I believe that this
was the most accurate and reliable way of doing these experiments.
If I was to perform a third experiment which was yet again improved I
would test a larger range of volts and find a more reliable way of
doing the experiment on a whole.
We have proved that oxygen is a product of photosynthesis and recorded
reasonable results showing the amount of oxygen produced. I have also
included graphs using the information in the tables. These show the
rate that oxygen was produced (rate of photosynthesis).
I think that this experiment was a good investigation into
photosynthesis and shows us about production rate of oxygen.