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
. Chlorophyll is the green substance found in chloroplasts and this is
why leaves look green. The chlorophyll is very important because it
makes the whole process occur. It absorbs the energy from the sunlight
and uses it to combine CO2 and water to produce glucose. Oxygen is
given off as a by- product. The structure of a leaf is also very
important as it is designed to obtain as much CO2 as possible.
There are three features that makes the structure of the leaf unique.
1. They are very thin and flat to provide a large surface so it can
soak up lots of sunlight.
2. The palisade cells are arranged near the top of the leaf and are
full of chloroplasts, essential for photosynthsis.
3. The guard cells, on the bottom layer, control the amount of gas
movement in and out of the leaf.
There is a formula that lets us know the rate of photosynthsis, it is:
Carbon Dioxide + Water ® (sunlight +chlorophyll) ® Glucose + Oxygen.
6CO2 + 6H2O ® (sunlight + chlorophyll) ® C6H12O6 + 6O2.
The rate of photosynthsis can be altered by three factors which are
the amount of light, carbon dioxide and the temperature. The reason
why the amount of light is important is because the chlorophyll uses
light energy so it can only produce glucose as fast as it is receiving
sunlight. Carbon dioxide is always in short supply because only 0.
For most aspects in life, we take lighting and general vision for granted. When we flick a switch we
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.
2. Width of the base which divided to 3 groups: 1: More than 5 mm; 2: between 3-5 mm; less than 3 mm.
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 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 = =
To make the test fair I will use the same amount of water and the leaf
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.
The glass doors gently moved aside at Heath’s presence with a calm whirring hum. With it being a horrendously bright day outside, Heath found the muscles around his eyes relaxing with a sigh when he finally didn’t have to shield his vision from the sun any longer. Fluorescent lights were miles better than sunlight, naturally – fluorescent lights did not burn flesh, they did not bring stinging pain to the eyes, and they did not pound heat relentlessly into the ground in the same unforgiving way that the sun did.
I sit at a table, facing a partitioned wall; and I’m looking at a lighted coal-oil lamp which stands on the table close to the wall. I am entirely focused on the lamp, and light. (102)
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.
Photosynthesis is a process in which plants and other organisms convert the light energy from the sun or any other source into chemical energy that can be released to fuel an organism’s activities. During this reaction, carbon dioxide and water are converted into glucose and oxygen. This process takes place in leaf cells which contain chloroplasts and the reaction requires light energy from the sun, which is absorbed by a green substance called chlorophyll. The plants absorb the water through their roots from the earth and carbon dioxide through their leaves.
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.
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.