Determining the Effect of Light Intensity on Photosynthesis Essay

Determining the Effect of Light Intensity on Photosynthesis Essay

Length: 1671 words (4.8 double-spaced pages)

Rating: Better Essays

Open Document

Essay Preview

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).

Since it is impossible to measure the uptake of carbon dioxide in
school laboratory conditions and water uptake is not an accurate
measure of photosynthesis due to the loss of water through the stomata
in transpiration, I will need to measure the products in order to have
an idea of the rate of photosynthesis. Glucose is stored within the
plant and is therefore not a feasible way of measuring photosynthetic
rate. However oxygen is released as a waste gas through the stomata
(pores located mostly on the underside of the leaves) and can be
collected and measured. I will use this information to formulate my
plan.

Other factors to consider

As the equation for photosynthesis shows, both carbon dioxide and
water can be limiting factors, i.e. if they are not present in
sufficient quantities, they will slow the rate of photosynthesis.
However, the chemical equation does not show four other important
factors, which will need to be taken into account. These are as
follows-

1. The reaction is endothermic. This means it takes energy from the
surroundings in order to provide the activation energy for the
reaction. The energy that is taken in duri...


... middle of paper ...


...ave already mentioned. Firstly, I have found out that
chlorophyll absorbs light at different wavelengths. I could
investigate the effect of different wavelengths on photosynthesis.
This might give me an indication as to whether or not the wavelength
of the light was the cause of my graph not levelling off. I would
expect, if I used a red light source, the graph would level off fairly
quickly because all of the light would be being absorbed and used
effectively.

In conclusion, I believe that the results I have gained in this
investigation are extremely reliable due to the use of a computer
simulation. As discussed, in the lab, my method has many sources of
error, but if I were to repeat this investigation I would make the
changes suggested above to try to eliminate the possible sources of
error as far as possible.

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 Essay example

- 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]

Free Essays
441 words (1.3 pages)

Essay on The Effect of Light Intensity on the Rate of Photosynthesis

- 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]

Free Essays
1311 words (3.7 pages)

Determining the Effect of Light Intensity on Photosynthesis Essay

- 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]

Better Essays
1671 words (4.8 pages)

The Effect of Light Intensity on the Rate of Photosynthesis Essay

- 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]

Better Essays
531 words (1.5 pages)

Essay on The Limiting Effect of Light Intensity on Photosynthesis

- 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]

Free Essays
613 words (1.8 pages)

Essay about Effect of Light Intensity on Photosynthesis in Elodea

- 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]

Free Essays
420 words (1.2 pages)

The Effect of Light Intensity on the Rate of Photosynthesis in an Aquatic Plant

- 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]

Free Essays
4194 words (12 pages)

An Experiment to Investigate the Effect of Light Intensity on the Rate of Photosynthesis

- 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]

Free Essays
970 words (2.8 pages)

Essay on The Effect of Light Intensity on Photosynthesis Of Elodea Canadensis

- 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]

Free Essays
991 words (2.8 pages)

Investigating the Effect of Light Intensity on Photosynthesis in a Pondweed

- 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]

Free Essays
1053 words (3 pages)