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. If I plot distance of the lamp,
against the number of bubbles per 2 minuets, I will get a straight
linear graph which will not go through the origin.
Introduction:
Photosynthesis is the process by which green plants use light to
synthesize organic compounds from carbon dioxide and water. In the
process oxygen and water are released. The glucose produced in the
photosynthesis reaction can be converted to sucrose and carried to
other parts of the plant in phloem vessels. Glucose can also be
converted into starch and stored (the starch can later be turned back
into glucose and used in respiration). Oxygen is a 'waste' product of
photosynthesis. Photosynthesis takes place in the mesophyll cells
inside a green plant's leaves.
6 CO2 + 6 H2O givesC6H12O6 + 6 O2
Carbon Dioxide + Water gives Glucose + Oxygen
A limiting factor is one that controls a process, such as organism
growth or species population size or distribution. In photosynthesis
the rate is affected by three factors, temperature, carbon dioxide
concentration and light. Not enough light can slow down the rate of
photosynthesis, without enough light a plant cannot photosynthesise
very fast, even if there is plenty of water and carbon dioxide.
Increasing the light intensity will make photosynthesis faster.
Variables:
In this experiment there are a few things we have to keep the same.
Photosynthesis consists of the following equation: Sun light Carbon dioxide + Water = = == == ==> Glucose + Oxygen Chlorophyll Chlorophyll is a substance found in chloroplasts, found in the cells of leaves.
The equation of photosynthesis is: 6CO2 + 6H20 Þ C6H12O6 + 6O2 = = = =
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
= = = [IMAGE][IMAGE]6CO2 + 6h20 light energy and chlorophyll C6H1206 + 6O2 Carbon dioxide + water converted into glucose and oxygen. Theory of photosynthesis Photosynthesis is a chemical reaction, which uses the energy from sunlight to convert carbon dioxide and water to oxygen.
Investigating Photosyntesis in Pond Weed Aim: The aim of this experiment is to find out what effects the amount of photosynthesis happening in a pond weed. Introduction: A piece of pondweed will be cut and placed into a test tube containing water and sodium hydrogen carbonate, which is placed inside a beaker containing water. A lamp will be shined on to the pondweed and the amount of bubbles released from the plant will be counted. The lamp will be adjusted to different distances from the plant to try and obtain different results. The amount of bubbles will be counted for a period of one minute.
the effect light has on the growth of pea plants. It will take place in an environment with controlled light, with equal amounts of plants being grown in the light and in the dark. All elements of the experiment other than light will be kept the same, such as amount of seeds in each pot, amount of soil in each pot and amount of water given to each plant each day. This will ensure a fair experiment. Prediction: I predict that in general, the plants grown in the light will grow better than those grown in the dark.
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 (literally, “synthesis from light”) is a metabolic process by which the energy of sunlight is captured and used to convert carbon dioxide (CO2) and water (H2O) into carbohydrates (which is represented as a six-carbon sugar, C6H12O6) and oxygen gas (O2)” (BioPortal, n.d., p. 190).
This equation means that O2 combines with sugars to break molecular bonds, releasing ATP. By-products of this reaction are CO2 and H2O. The process of photosynthesis can be assessed as: 6 CO2 + 6 H2O + Light Energy → C6H12O6 + 6 O2 This equation means that CO2 from the air and H2O combine in the presence of sunlight to form sugars; O2 is released as a by-product of this reaction. In the end, we see that
The three factors that can affect the rate of photosynthesis are light intensity, concentration of carbon dioxide and temperature.
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.
According to scientists, photosynthesis is “the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.” ("pho•to•syn•the•sis,")
Aquatic animals and plants that are living in algae or aquatic vegetation add carbon dioxide into their aquatic habitat during respiration and they also use up the oxygen particles during respiration, including those that are involved in decay. The temperature of the water does not place an effect on the rate of photosynthetic rates in algae or aquatic vegetation because photosynthesis will either add oxygen to the water, or photosynthesis will use up the carbon dioxide in the water. This information is known because the oxygen levels on the computer program Logger Pro either stayed the same percentage or fluctuated between 52% and 53% during the time of the
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.