The Effect of Temperature on the Rate of Photosynthesis.
The Effect of Temperature on the Rate of Photosynthesis Jas Singh 10D In all plants, a process called photosynthesis takes place. Photosynthesis is the process where by light energy is converted to chemical energy. It makes sugars and the by-product oxygen from CO2 and water, using the energy of sunlight. Photosynthesis occurs in chloroplasts. Here are the word and symbol equations for the process: Carbon Dioxide + Water Gluecose + Oxygen 6CO2 + 6H20 C6H12O6 + 6O2 In my investigation, I am going to investigate the effect of temperature on the rate of photosynthesis. The plant I am gong to use is pondweed. Prediction: I believe that the temperature surrounding the plant will have a significant effect on the rate of photosynthesis. I believe this because temperature affects all chemical reactions, and that photosynthesis should be no exception. I think that the rate of photosynthesis will steadily increase to begin with until around 30°C, where I think it will steady off. Then at 40°C I believe that the rate of photosynthesis will sharply decrease until it reaches zero. I think this because - as with all chemical reactions - enzymes are required. All enzymes have optimum levels at which they work best, and so I think that this point for the enzyme which acts on the plant during photosynthesis
Investigating the effect of temperature on the rate of photosynthesis
Investigating the effect of temperature on the rate of photosynthesis Contents Page Abstract:............................................................................... Aim:.................................................................................... Introduction:.......................................................................... Light dependent reactions in photosynthesis- Cyclic photophosphorylation............................ Non-cyclic photophosphorylation...................... Light independent reactions of photosynthesis................. Factors affecting the rate of photosynthesis..................... Limiting factors..................................................... Prediction:.............................................................................. Preliminary experiment: Method............................................................... Results ............................................................... Evaluation............................................................ Apparatus:.............................................................................. Method:................................................................................. Diagram:...............................................................................
How temperature affects the rate of photosynthesis.
Biology A2 Coursework How temperature affects the rate of photosynthesis Contents: Title: Page number: Abstract Introduction Preliminary experiment Aim Prediction Apparatus Diagram Method Key variables Safety Results Graph (individual) Graph (class) Statistical analysis (t-test) Conclusion Discussion Evaluation Bibliography Abstract: The aim of the experiment was to observe and analyse the affect of temperature on the rate of photosynthesis. This rate was measured by the rate of oxygen produced (mm3/min), by a photosynthesising plant (elodea), under different temperatures. A specialised apparatus called a potometer was used to observe this affect. A certain length of elodea (50mm) was cut at a slant at one end, and was placed in a test tube and was immersed in the pondweed water it was accustomed to. The cut end of the elodea was attached to a delivery tube which was connected to a measuring tube which was further attached to a syringe by rubber tubing. This whole apparatus (the potometer) was then placed in varying temperatures to measure the affect of the temperatures on the rate of oxygen production. For each temperature the length of the oxygen bubble released by the plant was measured by pulling it into
An Investigation into the Effect of Temperature on the Rate of Photosynthesis.
An Investigation into the Effect of Temperature on the Rate of Photosynthesis Theory The aim of my experiment is to determine how temperature affects the rate of photosynthesis of the aquatic plant Elodea. Photosynthesis is a chemical reaction that takes place in the leaves of green plants building up food compounds from carbon dioxide and water, and using the energy from sunlight, which is absorbed by chlorophyll. The chemical equation for the reaction of photosynthesis is: - chlorophyll 6C02 + 6H20 --> C6H1206 + 602 Carbon water light glucose oxygen Dioxide energy produced released This reaction will take place in my experiment and the oxygen released will be measured using the technique of counting the number of oxygen bubbles released from the aquatic plant. Catalysts speed up many chemical reactions without being used up or changed. Inside living organisms, chemical reactions take place all the time with a specific enzyme controlling every reaction. Enzymes are biological catalysts as they effect metabolic reactions. In all chemical reactions one thing is changed into another thing. The substance at the start of the reaction is called the substrate and the substance produced by the reaction is called the product. As enzymes are unchanged in reactions, a small
Investigation To Find The Effect Of Temperature On The Rate Of Photosynthesis Of Elodea.
Investigation To Find The Effect Of Temperature On The Rate Of Photosynthesis Of Elodea Hypothesis I believe that as the temperature rises, the rate of photosynthesis will also increase. That is until the plant reaches its optimum temperature and then the rate of photosynthesis will decrease. Photosynthesis is the process necessary for plants as this is how they obtain their food. The formula for this process is- 6CO2 + 6H2O ?6H1206 + 602. The rate of photosynthesis are affected by these factors: concentration of carbon dioxide, light intensity and temperature.If one of these factors increase, the rate of photosynthesis will increase but only to a certain point. The rate of photosynthesis could still increase but not because of an increase in that same factor. Another factor has to increase for the rate to increase. The factor that restricts the other two factors from increasing the rate of photosynthesis is called the limiting factor. For glucose to be made in photosynthesis, water is split into hydrogen and oxygen molecules by the energy absorbed from the sun. The hydrogen then has to combine with the carbon dioxide to produce glucose. If this was left on its own, the hydrogen would eventually combine with the carbon dioxide but it would take a long time. That is why a catalyst is needed to quicken the process. Enzymes are the catalyst used for the anabolic reaction.
Experiment to Investigate the Effect of Temperature on the Rate of Photosynthesis in Elodea.
Phil Cooper 02.08.02 Experiment to Investigate the Effect of Temperature on the Rate of Photosynthesis in Elodea Aim The aim of this experiment is to investigate the effect of temperature on the rate of photosynthesis in Elodea (Canadian pondweed). Introduction Elodea is native to North America and is naturalized in Australia, Asia and Europe. It grows completely submerged beneath the water. It has multi-branched, slightly brittle stems that are clothed with whorls of sessile, medium green, pointed leaves. Elodea grows better in cooler water. In temperatures above 70º F, it becomes spindly. This plant can be grown under 8 to 10 feet of water and will easily reach the surface of the average water garden. This plant derives most of its nourishment from the water through its leaves; its roots serve mainly to anchor it to the bottom, therefore, they may be planted in sand or pea gravel as well as soil. They may be anchored down and just dropped into the pond or planted in containers of sand or gravel. If they are only floated in the pond, too much sunlight and air will kill it. Photosynthesis is a process which occurs in all green plants, synthesising glucose as a form of energy to be used by the plant. Glucose (and oxygen - a waste product) are produced from a reaction between carbon dioxide and water. The general equation for photosynthesis is shown below. 6CO2 +
To Investigate the Effect of Temperature On the Rate of Photosynthesis in Canadian Pond Weed.
Planning an Experimental Procedure To Investigate the Effect of Temperature On the Rate of Photosynthesis in Canadian Pond Weed The purpose of the experiment is to find out how the effect of temperature will alter the rate of photosynthesis. What will happen with an increase of carbon dioxide, upon the rate of photosynthesis, when a certain amount of sodium hydro carbonate is added? Predicted Outcome During the experiment I predict that, as the temperature gradually rises, the rate of photosynthesis will also rise which will result in more oxygen being given off. As the temperature reaches 50oC - 60oC, I think the enzymes will start to breakdown and denature. This will result in photosynthesis decreasing, so therefore there will be a reduction in oxygen given off. Oxygen will be released until photosynthesis has completely finished. Hence between the temperatures of 100C and 600C there will be definite signs of an increase in oxygen given off but also definite signs of recreation in photosynthesis. If the lamp is placed nearer to the apparatus There will more oxygen given off. The sodium hydro carbonate will also speed up the process of photosynthesis. With the experiment that we are doing, we are giving the Canadian pondweed an artificial environment, so therefore we will not receive accurate results. Scientific Explanation of Predictions The process by which plants
How does changing the temperature affect the rate of Photosynthesis?
How does changing the temperature affect the rate of Photosynthesis? Photosynthesis is a necessary process which occurs in green plants, where the plant produces oxygen and makes food, taking place in the chloroplasts that contain chlorophyll. The chlorophyll absorbs the sunlight, and with that sunlight, water and carbon dioxide combine to make sugar and oxygen. The formula for this process is: 6CO2 + 6H2O > C6H1206 + 602 This process, photosynthesis, requires several important elements in order to occur. The factors which must be controlled are: temperature, light intensity, pH, light colour, H20, concentration of CO2 and amount of chlorophyll. When or if one of these factors is increased, the rate of photosynthesis will increase, though only to a certain point - the rate of photosynthesis though, could still increase, but not due to an increase in that same factor. In order for glucose to be made during photosynthesis, water's split into oxygen and hydrogen molecules. This is done by the enerrgy absorbed by the sun, following, the hydrogen must combine with the carbon dioxide to produce glucose. Without the sunlight, eventually the hydrogen would combine with the CO2, though it'd take a far longer time. A catalyst is needed to increase the rate of the process. In this case, the catalyst is enzymes. Enzymes work, colliding with the carbon dioxide and hydrogen. They only
Investigation into the effect of temperature on photosynthesis.
Helen Innes-Biology Coursework: Investigation into the effect of temperature on photosynthesis. Plan: I have previously investigated the effect of light intensity on the photosynthesis of pondweed. I would now like to adapt this experiment to investigate the influence of temperature. Method: In my previous experiment, we submerged a frond of pondweed in a beaker of water, and shone a microscope lamp on it, varying the distance and studying the results. To test the influence of temperature, we will need to arrange our apparatus so that the temperature can be varied without affecting the light intensity. * I will set up the pondweed in the beaker as before, but first placing it in an ice bath, till it has cooled to a suitable temperature, such as 5 C. * I will then remove it, and wrap it in foil, to ensure it remains at a stable temperature for long enough to measure the no. of bubbles per min. * After two minutes (I plan to take two results art each temperature to improve accuracy.) I will remove the foil and allow it to increase another five or perhaps ten Celsius. * I will repeat the process, continuing until the water has reached room temperature. * After this, I would set the beaker above a Bunsen burner on very low heat, and remove it every time the water reached a suitable temperature, initially perhaps 30 Celsius, and as before, rap
The aim of this experiment is the effect of temperature on the rate of photosynthesis in Elodea canadensis.
Biology coursework Investigating the rate of photosynthesis in Elodea canadensis INTRODUCTION AIM: The aim of this experiment is the effect of temperature on the rate of photosynthesis in Elodea canadensis. BACKGROUND KNOWLEDGE: As level: From Biology 1 (2000) JONES, FOSBERY + TAYLOR From AS level we learnt about enzyme structure and how products are formed. When carbon dioxide comes into contact with Rubisco it is converted to 2 X Glycerol-3-Phosphate. The yellow object is an enzyme. Enzyme's act as a catalyst to speed up the reaction and remains unchanged at the end of the process. With an enzyme present it increases the likelihood of a collision of the substrates to form a product. Enzymes are globular proteins and are coiled into three-dimensional shape, which have hydrophilic side chains on the outside to make sure they are soluble. In picture 1, we have a carbon dioxide molecule and a Rubisco molecule. These are called the substrate molecules. In picture 2, we have carbon dioxide and a Rubisco molecule combined with an enzyme. The enzyme is there to combine both molecules together. It is now called an enzyme-substrate complex. It is held together by temporary bonds between the substrate and side chains of the enzyme. In picture 3, the two molecules are combined and have now formed our product, Glycerate-3-phosphate. Picture 4 just demonstrates the
