The Effect of Carbon Dioxide Concentration On The Rate of Photosynthesis.
Sophie Louise Beard The Effect of Carbon Dioxide Concentration On The Rate of Photosynthesis Aim To investigate the effect of carbon dioxide concentration on the rate of photosynthesis. Prediction I predict the higher the carbon dioxide concentration (sodium hydrogen carbonate solution concentration) the faster and higher the rate of photosynthesis will increase meaning more oxygen produced (more O bubbles given off) over a period of time [2 minutes]. The amount of carbon dioxide taken in I predict will be proportional to the amount of oxygen given out. E.g. 6CO +6H O --> C H O +6O As the amount of CO O I predict the graph will look something like this At the end of the graph, it will eventually level off and stop producing oxygen due to the limiting factors. Diagram Variables Things we could change which would effect our results are -: * Amount of light intensity * Amount of carbon dioxide(sodium hydrogen carbonate solution molar) * Different conditions (temperature) * Amount of pond weed We are going to change the sodium hydrogen carbonate solution concentration/molar to look at the effect the amount of carbon dioxide has on the rate of photosynthesis. Everything else will be kept the same. Safety Be careful when handling glass and allow the lamp to cool before packing it away or touching. Keep the area your working in clean and tidy; clean
investigate the effect of carbon dioxide concentration on the rate of photosynthesis.
7/07/2004 Bilawal Ajmal Khan 10A H/W/K Science Investigation Aim: to investigate the effect of carbon dioxide concentration on the rate of photosynthesis. Scientific knowledge: The Elodea (Canadian pondweed) makes bubbles of oxygen when it photosynthesises. The faster it photosynthesises the faster it makes oxygen. The plant uses dissolved carbon dioxide. This can be made by adding hydrogen carbonate solution to the water. The factors which can effect how quickly a plant can make food by photosynthesis include the following. * Carbon dioxide concentration - this can be simulated by changing the volume of hydrogen carbonate solution added to the water. At low concentrations of carbon dioxide the rate of photosynthesis is very slow. As you increase the concentration of carbon dioxide the plant can make food faster and faster. There is a limit however. There comes a time when adding more carbon dioxide does not increase the rate of photosynthesis. The plant is making food as fast as it can under the conditions. * Light intensity - this can be altered by either changing the brightness of the bulb or by moving the bulb further and further away from the plant. Plants need light energy in order to make food. The more light they have the faster they can make food.
Investigate the effect of the light intensity on photosynthesis with different concentration of Carbon Dioxide.
To investigate the effect of the light intensity on photosynthesis with different concentration of Carbon Dioxide. Investigating the effect of light intensity on photosynthesis having two samples of a certain plant with 2 different carbon dioxide concentrations. H :There is no significant difference between the rate of photosynthesis of plants in different concentration of CO at different light intensities. H :There is a significant difference between the rate of photosynthesis of plants in different concentration of CO at different light intensities. The oxygen bubble coming off as a result of photosynthesis of plant in certain period of time (5 minutes) is collected and the volume of oxygen bubble is worked out. This volume is used for working out the rate of photosynthesis of the plant in a certain light intensity and CO concentration. Then the rate of photosynthesis of each sample of the plant, which has a different CO concentration, is recorded in 6 light intensities and the results are compared with each other. The results confirmed that as the light intensity decreases, the rate of photosynthesis decreases more for the plant with lower concentration of CO than the plant with higher concentration of CO . As light intensity and CO are chief external factors, which affect the rate of photosynthesis, and no photosynthesis occurs in the
The Effect of Carbon Dioxide Levels on Photosynthesis
The Effect of Carbon Dioxide Levels on Photosynthesis When the concentration of carbon dioxide is low the rate of photosynthesis is also low. This is because the plant has to spend a certain amount of time doing nothing, waiting for more carbon dioxide to arrive. Increasing the concentration of carbon dioxide increases the rate of photosynthesis. The time spent idle becomes less and less. There is a point at which further addition of carbon dioxide will not increase the rate of photosynthesis. The enzymes controlling the reaction are working as fast as possible, so the excess carbon dioxide cannot be utilized. Carbon dioxide is not the limiting factor at this
effect of carbon dioxide on rate of photosynthesis
Planning of photosynthesis investigation Aim: The aim of this experiment is to investigate into the effects of the change of carbon dioxide concentrations on the rate of photosynthesis. Prediction: My hypothesis is that as the concentration of carbon dioxide increases the rate of photosynthesis will also increase. Graph showing the effects of carbon dioxide on the rate of photosynthesis Light intensity Scientific reasoning: Photosynthesis is the process by which chlorophyll containing organisms capture energy in the form of light and convert it to chemical energy. Plants make food through a process called photosynthesis. Using energy from the sun, cells in the leaves turn simple materials into energy rich food. Spongy cells are partly surrounded with pockets of air, which enable the cells to exchange gases with the atmosphere. The stomata are small openings in the lower epidermis under the leaf. Carbon dioxide enters through the stomata. Carbon dioxide combines with water and is photosynthesised into oxygen and sugar. Equation for photosynthesis 6 CO2 + 12H2O?C6H12O6+ 6O2 + 6H2O Oxygen escapes through the stomata and the sugar dissolved in water is carried throughout the plant providing energy for growth. Photosynthesis consists of two stages: a series of light- dependent reactions, which are temperature independent and a series of light independent reactions,
how the concentration of carbon dioxide affects the rate of photosynthesis
In this course work, I will be discussing how the concentration of carbon dioxide affects the rate of photosynthesis. To find this out I will do an experiment to find out how much oxygen a piece of Elodea (Canadian pondweed) produces over a set period under controlled supervision. Back Ground Knowledge All plants photosynthesise, They do this in order to create their own food by converting sunlight, carbon dioxide and water into glucose and oxygen, which is a by-product (6Co + 6H O --> C H O + 6O ) Plants have a part in their cell called chloroplast which contain chlorophyll the diagram below explains: What are the limiting factors of photosynthesis? Although the diagram shows you what you need for photosynthesis it does not tell you what the limiting factors are. The limiting factors in photosynthesis are carbon dioxide, water, light and chlorophyll. This is because up to a point the more of each factor that is available to the plant will result in an increase in the photosynthesizing rate. Why did I use pondweed? I used pondweed so I could measure the amount of oxygen it produced accurately. I can do this by catching the oxygen bubbles under water, because of this choosing an aquatic plant was the best choice. I will use 5cm of elodea because it is a big enough piece to get a measurable result. I will know how quickly the elodea has photosynthesised by taking readings
How does the concentration of Carbon Dioxide affect the rate of photosynthesis?
How does the concentration of Carbon Dioxide affect the rate of photosynthesis? Aim The aim is to find out by experimenting the effect of changing the concentration of CO2 on the rate of photosynthesis. Background knowledge Before doing the investigation, I have to know about the limiting factors of photosynthesis: Light = To get different supplies of energy levels you need different amounts of light reaching the plant. Stomata = The more surface area on the leave of a plant allows more photosynthesis. Glucose = The amount of glucose can limit how much photosynthesis can be done. Humidity = The amount of photosynthesis is affected by the amount of water and water vapour available in the air. CO2 = The changing CO2 amounts affect the rate as it is a lazy reactant. Fertilisers = They can affect the rate of photosynthesis and are used to replace missing nutrients. The graphs on the next page show what Carbon Dioxide and Fertilisers do to plants. In photosynthesis, green plants need sunlight. They use the light energy to make glucose. Glucose can be converted into another type of sugar called sucrose and carried to other parts of the plant in phloem vessels. Glucose can also be converted into starch and stored. Both starch and sucrose can be turned back into glucose and used in respiration. Photosynthesis happens in the mesophyll cells of leaves. There are two kinds
Experiment - Influencing the Rate of Photosynthesis with Light Intensity and Carbon Dioxide Concentration
Aylin Humzeli April, 07 2011 Influencing the Rate of Photosynthesis with Light Intensity and Carbon Dioxide Concentration Introduction Background: Photosynthesis is the process plants use to produce organic molecules, usually carbohydrates, from carbon dioxide and water by using sunlight or an alternative source of light. The light is used as energy which is absorbed by chlorophyll in the chloroplast of plants. Photosynthesis is comprised of two different reactions: the light-dependent reaction and the light-independent reaction. The light independent reaction is powered by light energy and produces ATP and NADPH, as well as oxygen as its waste product. The light independent reaction is powered by the NADPH produced in the light dependent reaction and produces sugars using carbon dioxide. The general formula for photosynthesis is: 6H2O + 6CO2 + Energy ==> 6O2 + 2 C3H6O3 The rate of photosynthesis can be affected by 3 factors: light intensity, carbon dioxide concentration, and temperature. An increase in light intensity increases the energy absorbed by the chlorophyll, and hence increases the rate of photosynthesis to a point. Increase in the amount of carbon dioxide increases the amount of carbon dioxide available to the enzymes to catalyze. Carbon dioxide concentration increases the rate of photosynthesis only to a point, specifically, when the enzymes are
Experiment to investigate the effect of Carbon Dioxide on the Rate of Photosynthesis
Experiment to investigate the effect of Carbon Dioxide on the Rate of Photosynthesis Aim: To find out whether the increase in carbon dioxide affects the rate at which oxygen is released (this will effectively measure the rate of photosynthesis) from a Canadian pondweed, elodea. Introduction: Photosynthesis is the trapping of light energy to make glucose in plants. It is very important to all living organisms as it produces oxygen as an excretory product, which humans depend on. Light 6H2O + 6CO2 C6H12O6 + 6O2 Water + carbon chlorophyll glucose + oxygen dioxide It can be seen from the equation that water and carbon dioxide are very important in photosynthesis as without the process cannot take place. Once the leaf has these, it uses the chlorophyll to trap sunlight it then releases oxygen as a waste product. Finally the product (glucose), is transported to other parts of the plant or it is stored somewhere. Carbon dioxide provides carbon atoms in the reaction to form glucose. It can be seen that there are many factors which photosynthesis depends on and they will affect the plant. The following factors are the four main factors, which affect the rate of photosynthesis (how quickly photosynthesis takes place). Carbon dioxide Water Sunlight Temperature As the variable being investigated is carbon dioxide, it will be shown
Investigation into the effect of differentconcentrations of carbon dioxide on the rate of photosynthesis
Investigation into the effect of different concentrations of carbon dioxide on the rate of photosynthesis Aim To investigate into the effect of different carbon dioxide concentrations on the rate of photosynthesis. Introduction The investigation will be conducted using the method outlined in detail later on. In short, the water plant Elodea will be placed in a solution of altering hydrogencarbonate concentrations (0.02%, 0.04%, 0.06%, 0.08% and 0.1% as previous research has shown that concentrations above that start to damage the leaf.1) and the rate of photosynthesis will be measured by the volume of oxygen given off in a set amount of time, via a meniscus which is part of a photosynthometer apparatus set up. Prediction I predict that the rate of photosynthesis will increase as the concentration of carbon dioxide increases up to a certain point after which another factor limits the rate of photosynthesis e.g. light intensity or temperature. Variables -The independent variable is the concentration of carbon dioxide which will be manipulated to see what effect it has on the rate of photosynthesis. -The dependent variable is the volume of oxygen given off in the set amount of time. -The fixed control is the Elodea plant immersed in water with no added carbon dioxide in the form of hydrogen carbonate. -Potential confounding variable 1: It is known that plants absorb
