The graph, in a simpler way, shows that the higher the light intensity the faster the rate of photosynthesis. Besides the light factor I also decided to put a 100 watt lamp above each plant so I get a high light intensity to speed up the rate of photosynthesis. This means more carbon dioxide is being absorbed by the plant for photosynthesis. Light intensity, temperature and carbon dioxide can limit the rate of photosynthesis. At low light intensities, increasing the . Design a series of experiments, and explain what you would be looking for, to identify what the limiting factor for the rate of photosynthesis is, in this experiment, when light intensity is no longer limiting (don't worry too much about how you would change or measure different factors just say what you would change or measure). Is the variable in the x-axis increasing, decreasing or staying the same as the graph . When the temperature rises, the particles in the reaction move quicker and collide more, so the rate of photosynthesis rises also. Add conclusion choices, "What conclusion is best supported by the graph" (correct answers, but not in graph) Effect of light on the process of photosynthesis 1. Hypothesis I think that if the light intensity is very low, then the number of bubbles of oxygen produced will also be very low, For low to medium light intensity, explain the trend in the data. Theoretically, when the concentration of carbon dioxide and temperature are controlled at constant levels, the rate of . Method 1. Since the. Explanation. An excess is the same as a negative uptake. To determine the effect of light intensity on rate of photosynthesis, the leaf mixtures were subjected to intensities of 2200, 4250, 5300, 14400, and 20600 lux. . Light Intensity 2. Increasing the light intensity will boost the speed of photosynthesis. The intensity in this experiment was increased by moving the tube closer to the light. The project investigator will place a sprig of elodea (underwater) plant under a clear funnel then fill a test tube with water and it placed on top of the funnel. the equation for the photosynthesis process is; CO2 + 2H2O + Light Energy ========> [CH2O} + O2 + H2O, This shows that when the light intensity is increased the rate of reaction will be more quicker he only anomalous result there was, is This experiment will look at the affect of light intensity on the rate of photosynthesis on Elodea plants. That mean the rate of photosynthesis also decreases in this graph. The rate of photosynthesis should decrease and therefore the amount of oxygen bubbles should decrease. (d) Light intensity, temperature and concentration of carbon dioxide are factors that affect the rate of photosynthesis. The effect of light intensity on the photosynthesis rate using an aquatic organism The effect of light intensity on photosynthesis can be investigated in water plants. Lastly, the reason a green light was used in order to see was because chlorophyll absorbs all colors of light except for green and yellow (Chiras, 1993). At low temperature, the enzyme does not have enough energy to meet many substrate molecules, so the reaction is slowed. Graph 1. How does light intensity affect the rate of photosynthesis? The effect of . Subtract the original volume at 00:00:00 from the final reading at 00:02:00 to determine the volume change. As you rise from low light intensity to higher light intensity, the rate of photosynthesis will increase because there is more light available to drive the reactions of photosynthesis. Biology Coursework ¡V Does The Light Intensity Affect the Rate of Photosynthesis The Investigation In this experiment I will investigate the affect in which the light intensity will have on a plants photosynthesis process. With the increase in light intensity and carbon dioxide concentration the rate of photosynthesis increases. However, at sufficiently high levels of light intensity, the rate oxygen evolution remains constant. Aim: The purpose of this experiment is to find out under what wavelength (different colour of light) the elodea plants are able to grow and photosynthesise the best. 2) In this experiment, we are trying to find the effect of light intensity on the rate of photosynthesis of pineapple leaf. Graphs show that the higher the intensity, the higher rate of photosynthesis. How does light intensity affect the rate of photosynthesis graph? Light intensity is changed by moving the lamp farther and farther from . The effect of light, temperature and carbon dioxide in the air can be measured experimentally, varying one factor while keeping the others the same. Light intensity The bulb will be kept at 5cm away from the test tube containing the Cabomba flower at all times Keeping the light intensity the same means it will have no additional effect on the rate of photosynthesis. Rate of photosynthesis 3. Here a rise in light intensity has no affect on the rate of photosynthesis as the other factors such as temperature and carbon dioxide become limiting. This experiment will look at the affect of light intensity on the rate of photosynthesis on Elodea plants. Terms in this set (18) As light intensity increases (distance between lamp and plant decreases) the volume of oxygen (or the rate of bubble production) increases. Light energy absorbed by chlorophyll is converted to ATP and H+; At very low light levels the plant will be respiring only not photosynthesising. 2) photosynthesis requires carbon dioxide to furnish the carbon required to make glucose. The reason that light intensity does affect the rate of photosynthesis is because as light, and therefore energy, falls on the chloroplasts in a leaf, it is trapped by the chlorophyll, which then makes the energy available for chemical reactions in the plant. b. Light energy is needed for photosynthesis, so as the light intensity increases, the rate of photosynthesis chemical reactions steadily increases in a linear manner - 1st part of the graph is 'light limiting'. The graph shows that the distance from light intensity are increased when the rate of dye reduction decrease between 0.3m to 1.1m. Low light was shown to substantially affect the agronomic traits of plants and inhibit physiological metabolic processes, including photosynthesis and antioxidant characteristics, as well as carbon and nitrogen fixation [3-6]. Graph the results placing temperature on the x-axis. The rate of photosynthesis should decrease and therefore the amount of oxygen bubbles should decrease. Use Excel to draw a graph describing the relationship between the light intensity and the rate of photosynthesis (slope). These factors are the concentration of carbon dioxide in water, humidity and temperature. According to Reckitt Benckiser (2016), as light intensity decreases the rate of photosynthesis also decreases in an almost linear pattern. Due to lowered light intensity, the rate of photoionization of the chlorophyll pigment decreases, therefore slowing down the rate of the light dependent reaction. This will be done by measuring the bubbles of oxygen and having a bulb for the light intensity variable. To do this, a number of factors will be kept constant. You should be aware that light is needed for photosynthesis and so should easily conclude that a higher light intensity leads to faster photosynthesis. The reason that light intensity does affect the rate of photosynthesis is because as light, and therefore energy, falls on the chloroplasts in a leaf, it is trapped by the chlorophyll, which then makes the energy available for chemical reactions in the plant. Research Question: How does light intensity affect the rate of photosynthesis more precisely the rate of reaction in photosystem II, at the primary acceptor location? The reason behind this is that as the plant is closer to the Lamp, the light intensity increases, and as the light intensity increases, so does the rate of photosynthesis, so hence more oxygen is produced as a result. For the Effect of Light Intensity Experiment, calculate the rate of oxygen production for the light intensity of 6. Graph showing the effect of light intensity on the rate of photosynthesis. The graph below shows the scientists' results. The more light a plant receives, the faster the rate of photosynthesis; This trend will continue until some other factor required for photosynthesis prevents the rate from increasing further because it is now in short supply . (c) What do C and D represent on the curve? []Martineau et al. A plant is shown in a beaker and test . 61, 62, 63) AIM The aim of this experiment is to investigate the effects of light intensity on the rate of photosynthesis by counting oxygen bubbles. How does low light intensity affect photosynthesis? 2. As the light intensity decreases, the rate of photosynthesis also decreases, hence there's a directly proportional correlation between the two variables. So this means more carbon dioxide uptake occurs. This means the rate of photosynthesis increases beyond the rate of respiration (point D). As the light intensity increases the rate of photosynthesis follows (point B on the graph). This means more carbon dioxide is being absorbed by the plant for photosynthesis. A variable that is hard to control is the effect of temperature as the lights used may heat the water. Light Intensity 2. In this experiment, the light intensity is changed, by decreasing the light intensity. Find out more with Bitesize. As shown in the graph as the light intensity increases, the photosynthesis rate increases until a point is reached where the rate begins to level off into a plateau. More light, more molecules 'energised' to react. #41 Effect of Light intensity on the rate of Photosynthesis Plants need light energy to make the chemical energy needed to create carbohydrates. The graph shows the effect of increasing light intensity on the rate of CO2 [1 mark] uptake by a species of green plant maintained in conditions of constant temperature and CO2 concentration. light intensity the lower the gradient of the curve. As the light intensity increases the rate of photosynthesis follows (point B on the graph). Rate of photosynthesis = volume of oxygen produced ÷ time elapsed. Hypothesis Light intensity is directly proportional to the rate of photosynthesis. Pioneer experiments on plant growth under red LEDs on lettuce were reported by Bula et al. A change of light intensity would result in a change of photosynthesis rate. Is the variable in the x-axis increasing, decreasing or staying the same as the graph . As light intensity decreases with the distance, these observations suggest that decreasing light intensity had a negative impact on the number of bubbles produced. Use any method you like. Gradually the rate falls of and at a certain light intensity the rate of photosynthesis stay constant (from point B to C on the graph). At a very high intensity of light, the rate of photosynthesis would drop quickly as the light starts to damage the plant. As the light intensity increases the rate of . . Based on the graph, answer the following questions : (a) At which point/s (A, B or C) in the curve is a light limiting factor? 1. In this experiment, the light intensity is changed by changing the distance of the source of light closer or further away from the elodea, so theoretically, when the intensity becomes stronger due to the light source being closer to the Elodea, the rate of photosynthesis should increase and therefore the number of oxygen bubbles will increase too. In the Gizmo, what light intensity and CO 2 level do you think will maximize the rate of photosynthesis? After that point, the rise in light intensity has no effect on the rate of photosynthesis as the other factors such as temperature and carbon dioxide become limiting. From the gradient of the two lines I shall be able to draw a graph on the rate of photosynthesis. I predict that as the light intensity increases that the rate of photosynthesis will increase in proportion, so for example if you increase the light intensity from 10cm away to 20 cm away form a stationary plant. As you rise from low light intensity to higher light intensity, the rate of photosynthesis will increase because there is more light available to drive the reactions of photosynthesis. data grow exponentially, there is obviously a significant difference between each of the light . 9. The results of this experiment will be recorded in a table in order to be able to see the trend in the number of bubbles . In this experiment, the light intensity is changed, by decreasing the light intensity. Core practical 10: Investigate the effects of different wavelengths of light on the rate of photosynthesis This lab was created to replace the popular waterweed simulator which no longer functions because it is flash-based. Answer: You can do it with any pondweed. The research aspect of this science fair project is to assess how light intensity affects the rate at which photosynthesis occurs and the rate of oxygen production. Light intensity limitation. 1. The graph below . This is clearly shown when, the light is 3cm away from the plant, the rate of the bubbles is 36.5 and when the light is further away at 15cm the rate of bubbles is 23 . The aim is to construct an experimental set up that allows a quantitative analysis of the rate of photosynthesis under different light intensities. This means the rate of photosynthesis increases beyond the rate of respiration (point D). Leave for five minutes for the pondweed to acclimatize (adjust) to the new light intensity. Measure the rate of photosynthesis in this experiment with online and lab options. Control Room temperature ºC For example, the amount of light will affect the rate of photosynthesis. PAR intensity is an important factor that determines the rate of photosynthesis. Be sure your investigation includes the following: Question you will investigate. If you carried out a photosynthesis experiment using an incandescent bulb, how would you expect this to affect the results? As the light intensity increases so does the rate of photosynthesis up to a point (since light intensity is a limiting factor). Cou. The rate of photosynthesis increases linearly with increasing light intensity. For every 10 o C increase in temperature the rate of photosynthesis doubles and at optimum temperature the rate begins to decrease. The graph shows that the distance from light intensity are increased when the rate of dye reduction decrease between 0.3m to 1.1m. Explain your reasoning. Aim. Divide the change in volume by the time, 2 min, to obtain the rate of O2 . Another assumption is that all the bubbles are the same size. What data / variable is the x-axis identifying? a. The graph shows the relationship between rate of photosynthesis and light intensity as influenced by both temperature and CO2 concentration. Photosynthesis Virtual Lab. The amount of light received affects the light reactions of photosynthesis because the higher the light intensity means more photons are hitting the leaves of the plant therefore the rate of photosynthesis will increase because there is more light available to help the reactions of photosynthesis. The rate of photosynthesis should decrease and therefore the amount of oxygen bubbles should decrease. As the rate increases, eventually another factor will come into short supply. The effects of changes in light intensity on the rate of electron transport from photosystem II to artificial electron acceptor 2,6-Dichlorophenolindophenol in the light reactions of photosynthesis in Spinacia oleracea L. Maddie Gibson Group members: Addison Ely, Brooke Koebele, Elise Ziegenhorn . As the light intensity increases, the rate of photosynthesis increases.However, the rate will not increase beyond a certain level of light intensity. In this virtual photosynthesis lab, students can manipulate the light intensity, light color, and distance from the light source. However, at high light intensities the rate becomes constant. The gradient for the experiment when the light is 20cm away from the beaker, at point A it is 11.74, at point B it is 12.41 and at point C it is 12.22. If there is no light, there will be no photosynthesis. The results should be displayed on a graph of light intensity vs. rate of photosynthesis. Users may need to adapt the risk assessment information to local circumstances. With a colored filter applied, the greatest photosynthesis rate was for red light at 0.011 O 2cm3min-1. In this lab, we will study the effect of light intensity and quality (wave length - color) on photosynthesis. Refer to the generalized light response curve for photosynthesis to answer the following. LIGHT INTENSITY. In this experiment, the light intensity is changed, by decreasing the light intensity. If a compound was added to the experiment where . What data / variable is the y-axis identifying? Prediction. Aim of the Experiment: To analyse the effects of light intensity on photosynthesis via the Hill reaction. …. For students between the ages of 11 and 14. The effect of these variables could then be measured by increasing the temperature of water (by using a water bath) or increasing the concentration of sodium hydrogen carbonate respectively. conclude that after light intensity (in W) is increased, the plant's mass increases 1%. Aim of the experiment To use pondweed to see how light intensity affects the rate of photosynthesis. This carbon dioxide will be supplied by sodium bicarbonate dissolved in the water with the plant leaf disks [] calculated that the amounts of dry matter per mole of artificial lighting gained by lettuce grown using red (650 nm) LEDs or high-pressure sodium lamps were identical, and Chang et al. 6CO 2 + 6H 2 O + light energy C 6 H 12 O 6 + 6O 2. 2. The maximum rate of dye reduction is 0.398 at 0.3m from the light and the minimum rate of dye reduction is 0.045 ate 1.1m from the light. The rate of photosynthesis is determined by the number of bubbles formed by the Elodea plants. Shannan Muskopf November 7, 2020. Photosynthesis is a process whereby green plants use the energy of sunlight to produce sugars from the inorganic raw materials carbon dioxide and water. An experiment was . Photosynthesis has two stages. Three fully resourced lessons on photosynthesis.Photosynthesis factsVirtual investigation 1 - does light intensity affect the rate of photosynthesisVirtual investigation 2 - testing a leaf for starch The virtual investigations take the student through prediction, planning drawing a graph and conclus Repeat steps 1-5 for each bicarbonate solution ranging in concentration . How does light intensity affect photosynthesis at ambient temperature (25th(C), using the same plant (elodea), the same amount of water (230 mL), the same light color (white) and changing the distance between the light source and the eloid plant? (a) Light-emitting diode light(s) can sustain normal plant growth. Stage 1 requires light. Set up the apparatus as in the diagram. … At a very high intensity of light, the rate of photosynthesis would drop quickly as the light starts to damage the plant. Aim To observe the effect of light intensity on the rate of photosynthesis. 1) the variables of light intensity, temperature, carbon dioxide, light quality all influence the rate of photosynthesis. When the light intensity is increased, the rate of bubble production should increase. It causes slow growth, decrease of leaf weight and flower bud number. The energy accumulated in Stage 1 is used to drive Stage 2. Here a rise in light intensity has no affect on the rate of photosynthesis as the other factors such as temperature and carbon dioxide become limiting. Quantity of water measured by the graduated cylinder and used 230-mL during the experiment . Experiment : Use the Gizmo to find the ideal conditions for photosynthesis. The light reaction is used to convert sunlight into chemical energy stored in ATP and another energy storage molecule called NADP. Investigate the effects of different wavelengths of light on the rate of photosynthesis Practical activities have been safety checked but not trialled by CLEAPSS. Experiment 3: Effect of Light Intensity. Gradually the rate falls of and at a certain light intensity the rate of photosynthesis stay constant (from point B to C on the graph). When plants that spend their life submerged in water release oxygen it forms bubbles, which we can count over a period of time . The lowest rate of photosynthesis was green light at 0.030 O What data / variable is the y-axis identifying? The figure shows the effect of light on the rate of photosynthesis. So this means more carbon dioxide uptake occurs. The maximum rate of dye reduction is 0.398 at 0.3m from the light and the minimum rate of dye reduction is 0.045 ate 1.1m from the light. How does sunlight affect photosynthesis? As light intensity increases, the rate of photosynthesis will increase as long as other factors are in adequate supply. As a measure of the rate of photosynthesis, we will monitor the rate of oxygen production. for the rest of the experiment. This is the same if there is the light intensity is too high as this can damage the chloroplasts in plants and this will minimize the rate of photosynthesis. In this experiment, the photosynthesis rate is measured at five different times, each time with a different light intensity. Use Cabomba or Elodea, which. Add conclusion choices, "What conclusion is best supported by the graph" (correct answers, but not in graph) Effect of light on the process of photosynthesis 1. A treatment was performed in the dark (0 lux) for the control. An assumption being made in this experiment is that the gas bubbles being counted are only oxygen, and that production of oxygen is proportional to the rate of photosynthesis. Experiment Hypothesis of expected results …. The aim of my experiment is to find out how light intensity affects the rate of photosynthesis. heat into the environment. 2 formed. At low light intensities above the light compensation point (LCP), photosynthetic rate increases proportionally to the light intensity and reaches a maximum. What data / variable is the x-axis identifying? The rate of photosynthesis is determined by the number of bubbles formed by the Elodea. Photosynthesis. This indicates that the rate of photosynthesis increases with light intensity. Too high or too low PAR intensities adversely affect the photosynthetic machinery. When the light isn't intense, not many oxygen bubbles will be produced and thus observed. Rate of photosynthesis 3. (Walpole, Merson-Davies and Leighton, 2011, pg. (b) What could be the limiting factor/s in the region A? In this experiment it will be seen that as the light intensity increases, the rate of photosynthesis would increase too. 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