Light intensity refers to the strength or amount of light produced and is the measure of the wavel… 4.
StudyMode - Premium and Free Essays, Term Papers & Book Notes. Prediction. 1) the variables of light intensity, temperature, carbon dioxide, light quality all influence the rate of photosynthesis. ...Aim
As that is where the syringe will suck in the oxygen as shown below in the diagram. (Root hairs also collect minerals and nutrients for the plant through active uptake). That corresponds with my prediction. 03 2004. Photosynthesis can be defined as the production of simple sugars from carbon dioxide and water causing the release of sugar and oxygen. Oxygen is the waste product that is given out via the stomata pores when they become turgid, this is during the process of respiration. The Investigation
It is best described from the following equation, Water + carbon dioxide sunlight glucose + oxygen, 6H O +6CO C H O +6O (The balanced equation). 03 2004
, "The effect of light intensity on the rate of photosynthesis" StudyMode.com. I don’t feel that I could improve the way I carried out the experiment. Then I will measure at 11 different distances (three times each) of the light away from the test tube with the plant in and then pull the syringe head out.
Essaybank.co.uk/free_coursework/1649.html. In this experiment a 100 Watt bulb was used. Plant Growth Plant growth processes involve the use of light, carbon dioxide and water to manufacture food for the plant’s use, according to the Texas A&M University Agricultural Extension Service. Hypothesis
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. Then the other ruler parallel to the test tube. LIGHT INTENSITY. You will notice that they are not direct halves of each other this is because of how much oxygen the plant decides to give off will change. This experiment will look at the affect of light intensity on the rate of photosynthesis on Elodea plants. later experiments on the effect of light intensity on photosynthesis. The results did approximately what I expected them to do ; decrease as the light was moved away so reducing the light intensity approximately proportional to the distance of which the lamp was moved. The faster the bubble moves, the greater the rate of transpiration. The concentration of water, carbon dioxide, the temperature and the light intensity are the most common environmental factors to affect photosynthesis (Lincoln 2010). To work out how light intensity can affect the rate of photosynthesis. Photosynthesis represented by the equation 6H2O + 6CO2 → C6H12O6 + 6O2 is one of the most crucial chemical reactions on earth as it produces O2 molecules– a gas vital to the survival of many organisms (Vidyasagar, 2018) This process takes place during the light dependent phase of photosynthesis and is indicated by the production of bubbles and can be used to analyse the rate of photosynthesis (Benckiser, 2016). The effect of light intensity on the rate of photosynthesis Photosynthesis depends on the amount of light available. Photosynthesis occurs in leaves that contain specialized cell structures called chloroplasts. Affect the Rate of Photosynthesis
Hypothesis: I predict that as the intensity of light increases, so will the rate of photosynthesis. Why is this? INTRODUCTION: Because due to the program we could easily set the temperature for 30 degrees and also easily set the time and the sodium bicarbonate and so make sure that all the possible variables stay the same. Graph 1. . As the bulb emits light in all direction we use the area of a sphere with the radius being the distance from the pond weed. This will be done by measuring the bubbles of oxygen and having a bulb for the light intensity variable. This is partly due to the fact we did the test via a computer program as the real test would be time consuming and less accurate. This article will have all you need to know about the Biology IAA coursework on the investigation into the effect of light intensity on the rate of photosynthesis. The number of bubbles given off in a minute is taken as the rate of photosynthesis and plotted against the calculated light intensity. Water is essential for the process of photosynthesis and also to stop the plant from wilting, because plant cells take up water via osmosis which makes them tight or turgid and so the plant stays upright, but if there is no water in the cell then the cell becomes flaccid and loose causing the plant to wilt and die.
Particularly, light intensity has a great influence on the photosynthesis and accumulation of secondary metabolites. This is obtained by firstly the sunlight shining down on a plant, which gives the energy for the reaction to take place. (Walpole, Merson-Davies and Leighton, 2011, pg. Experiment to demonstrate that carbon dioxide enters the leaf through the stomata: 7. 00:25 What is the colour change of the indicator if photosynthesis is occurring (faster than respiration)? affect how quickly photosynthesis takes place within a plant. Thus, as the amount of sunlight, or in this case light from a bulb, falls on the plant, more energy is absorbed, so more energy is available for the chemical reactions, and so more photosynthesis takes place in a given time. glucose is the resulting energy that is needed by the plant to grow and survive. University Of Botswana
At the same time as this the left over water vapour and oxygen are diffused out also through the stomata which again have to be turgid to let it out. At higher temperatures, the thin 03 2004. I found that the experiment was easy to do. The reason This will be done by measuring the bubbles of oxygen and having a bulb for the light intensity variable. And so from my graph I can see that as the light moves away from the plant in the test tube that the rate of photosynthesis decreases. Aim: To investigate the effects of light intensity on photosynthesis. But the way I explained to set up the experiment is the same way it was set up on the computer program, making my method correct. Background: Photosynthesis is a process that plants undergo to produce glucose. There for the rate of photosynthesis will decrease proportionally with the distance of the light from the plant (in this case a half). 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. carbon dioxide from the air and water... ...Introduction: Photosynthesis is the process by which green plants use the light energy to convert carbon dioxide and water into simple sugar called glucose, which provides a basic energy source for the plant. The aim of the experiment was to determine whether different light intensities have different effects on the rate of photosynthesis of two plants, one grown in normal light conditions and one grown in shade conditions. Light intensity limitation. For most crop plants, even a slight increase or decrease in light intensity leads to considerable changes in leaf morphology and structure (Wu et al., 2017). Background: Photosynthesis is a process that plants undergo to produce glucose. Photosynthesis is the process that plants use to create energy for themselves. Photosy... ...Introduction: Photosynthesis is the process by which green plants use the light energy to convert carbon dioxide and water into simple sugar called... ...Chlorophyll Extraction
03, 2004. Yes, another boring IAA exam which makes it vital to have no slip ups in the method, validity, reliability, evaluation or conclusion. Our library contains thousands of carefully selected free research papers and essays. Discover great essay examples and research papers for your assignments. Here a rise in CO2 levels has no effect as the other factors such as light intensity become limiting. This means that as the light moves away then there is less light given to the reaction for photosynthesis to happen. Now I will place the meter ruler next to the test tube as shown in the diagram below and place the lamp along side it so the distance of the light can be measured accurately. This would happen because of the age of the plant or the ability to carry out photosynthesis may have decreased slightly making it impossible to get exact answers. We are using 2 kinds of light … This is because light plays a major role in photosynthesis, it helps the leaf to give out oxygen and take in carbon dioxide from the atmosphere which is polluting our world. ; 01:14 Why must the balls be restored to room temperature before use?
"The effect of light intensity on the rate of photosynthesis" StudyMode.com. This will be done by measuring the bubbles of oxygen and having a bulb for the light intensity variable. 2), we want to determine the intensity and distance from light affect the rate of photosynthesis in aquatic plant because the plant itself needs more water to grow. Aim. 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 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'. Your Task Design a series of experiments to determine how temperature and light intensity affect the rate of photosynthesis in spinach. Also instead of measuring the length of the oxygen bubble I could have taken measurements changing the light intensity by percentage (%) or power of the light. ; 01:30 What colour is the indicator solution after illumination? 1. Plants, through the use of chlorophyll (green pigment in plants) that traps light can generate ‘food’ by combining carbon dioxide in the air and water. You will then develop a conceptual model that explains why. to photosynthesis. The portion of the leaf exposed to light gives positive starch test, i.e., it becomes deep blue in iodine solution, whereas, the covered portion of the leaf gives negative starch test and does not become blue-black in iodine solution. I predicted that as the light moved away the rate of photosynthesis decreases proportionately to the distance the light is moved away. What is Photosynthesis? ...The Effects of Light Intensity on the Rate of Photosynthesis
Use Cabomba or Elodea, which are sold in aquarium shops. And finally sunlight is needed for the process of photosynthesis to take place. Aim: To investigate the effects of light intensity on photosynthesis. 2) photosynthesis requires carbon dioxide to furnish the carbon required to make glucose. What is Photosynthesis? I was correct as when we look at the for example we notice at the distance of 50 cm that the measurement of Oxygen was 2.96 cm where at when we look at the distance of 100 cm we see that it has approximately halved to 1.1 cm. More light, more molecules 'energised' to react. According to past comparative studies, the dry matter of roots, stems, leaves, and whole plant as well as the photosynthetic rate, transpiration, an… In photosynthesis, a plant takes 2004. This is because there is a further distance for the light to each the plant in order for it to photosynthesise. Retrieved 03, 2004, from https://www.studymode.com/essays/Effect-Light-Intensity-Rate-Photosynthesis-64970458.html, "The effect of light intensity on the rate of photosynthesis" StudyMode.com. For example if one measurement is taken the if the light is moved away after it approximately double the distance then I would expect the rate of photosynthesis to drop. Light intensity and quality are among the most critical environmental factors for crop physiology and biochemistry (Yang et al., 2018a). In this experiment I will be investigating the impact of light intensity on the rate of water uptake, due to transpiration, by attaching a shoot from a leafy plant in the capillary tube of a potometer, and then measuring how long it takes for a bubble to move a set distance. The aim of my experiment is to find out how light intensity affects the rate of photosynthesis. Water is taken in via the root hairs which stick out in to the soil, these are located on the roots themselves, because of these root hairs this gives the plant a bigger surface area in which it can absorb more water.
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