Fill in the table below with the results from your first experiment. This is my procedure to investigate the effect of light intensity, carbon dioxide concentration and temperature in Elodea (a pondweed): 1. Faster Rates of Photosynthesis in Spinach Spinacia Oleracea Leaves as Light Intensity Surges Abstract Photosynthesis is a food making process that autotrophic. In this experiment, a light is moved further from a photosynthesising plant to vary the light intensity the plant receives. The Effect of the Distance of Sunlight from an Elodea plant on the Rate of Photosynthesis. The evidence for this is that as the concentration of carbon dioxide is increased, the rate of photosynthesis also increases. This preview shows page 1 - 3 out of 5 pages. Graph showing rate of photosynthesis and carbon dioxide concentration. Measuring the rate of Photosynthesis Adding a pinch of baking soda and phenol blue to the water in the test tube improves results Elodea stems were cut at an angle and the ends of the stems were crushed using fingers The water in the beaker is meant to absorb the heat from the. Increasing the carbon dioxide concentration increases the rate of photosynthesis, provided the plant is warm enough, and has plenty of light and water. Remove several leaves from around the cut end of the stem. ... questions and answers University of Delaware Biology 207 Notes for Whole Semester. Count the number of bubbles given off in one minute. To improve results, add a pinch of baking soda to the water in the test tube. There are several limiting factors which can reduce the rate of photosynthesis, eg temperature, light intensity and carbon dioxide concentration. Carbon dioxide is needed for photosynthesis. 1) Why is measuring the liberation of oxygen bubbles in Elodea as shown in the virtual lab a good way to measure photosynthetic rate? Use the link below to perform a virtual photosynthesis experiment. Assemble the equipment needed to measure the rate of photosynthesis in elodea (water plant). photosynthesis, and the bubbling should cease. The intensity of light at different distances from a light source can be described by the inverse square law. Photosynthesis Abstract: An experiment was carried out to determine how certain factors such as light intensity and availability of carbon dioxide, affected the rate of photosynthesis. There are a number of factors which contribute towards the process of photosynthesis. Photosynthesis is controlled by enzymes, which become denatured if the temperature is too high. The maximum rate is determined by the other factors involved. There is a range of apparatus that National 5 Biology students must have knowledge of. Photosynthesis Lab report. Add water to test tube and a pinch of baking soda. Why did the volume increase in the gas syringe? What is limiting the rate of photosynthesis at points A and B on the graph? Calculate the change in volume for each measurement time. Course Hero, Inc. could be temperature or light intensity. using immobilised algae), via the production of oxygen in pondweed, via the increase in dry mass, and via the production of carbohydrates. The Effect of the Distance of Sunlight from an Elodea plant on the Rate of Photosynthesis. Move the light 10 cm further back. Elodea is an aquatic plant that is easy to use for photosynthesis experiments. Leave for five minutes for the pondweed to acclimatise to the new light intensity. 2. There are various set-ups that can be used to measure the rate of photosynthesis, each relies on counting the oxygen produced during the reaction. Photosynthesis SHORT ANSWER Experiment 1: Measuring the Rate of Photosynthesis Lab Results 1. It is the simplest method. IntroductionThis lab has been created in order to find what extent does distance from a light source (5cm, 10cm, and 15cm) affect the rate of photosynthesis (measured in bubbles / 3 min) in Elodea water plants. The limiting factor at point B could be temperature or light intensity. Prepare different concentrations of sodium hydrogen carbonate solutions: 0%, 5%, 10% NaHCO3, in different beakers. Cut the tip of â¦ , then decreases. docx and S-7-8-1_Rate of Photosynthesis Lab KEYâ¦ Infantry battalions of the United States Marine Corps. Bromthymol blue is used as an indicator for the presence of CO2 in solution. Press start and record the bubbles per minute for each of the following light distances. Course Hero is not sponsored or endorsed by any college or university. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product. An increase in light intensity will produce an increase in the rate of photosynthesis until a level of light intensity is reached [normally 38% Part 1: Measurement of Photosynthesis. Fill in the table below with the results from your first experiment. This lab involves the qualitative measurement of the changes in carbon dioxide concentration associated with respiration and photosynthesis in the freshwater plant Elodea. The maximum rate is determined by the other factors involved. Graph showing rate of photosynthesis and temperature, Graph showing rate of photosynthesis and light intensity, A light source positioned at a distance from a photosynthesising plant. The course also involves being able to describe and carry out experimental and measuring techniques. Light is essential for photosynthesis. Slice off a portion of the stem at an angle and lightly crush the cut end of the stem. The SI unit for light intensity is lux. Shortly before the lab starts, add carbon dioxide to the bromothymol blue. As with other chemical reactions, the rate of photosynthesis increases as the temperature rises. It should remain constant. Waterweed Simulation Answer Key. The factor which is working at the lowest level will usually be the limiting factor of the process. elodea photosynthesis lab answers, Photosynthesis Lab for AP biology where students use a sprig of elodea. As a result, the rate of photosynthesis reaches its maximum at an. Elodea High School Inquiry/Scientific Method Plants. By measuring the rate at which the bubbles are produced it is possible to tell how fast the plant is photosynthesizing. The first Virtual Lab is Measuring the Rate of Photosynthesis of Elodea from the University of Reading. Photosynthesis Virtual Lab #2 - Measuring the Rate of Photosynthesis in Elodea. Sign in Register; Hide. Lesson 10 Photosynthesis Answer Key Concept 10.1 Photosynthesis converts light energy to the chemical energy of food. The rate of photosynthesis is measured by one of the following methods: By measuring (I) the volume of CO, consumed (2) volume of oxygen liberated (3) amount of carbohydrate accumulated. The rate of photosynthesis at point A is being limited by the concentration of carbon dioxide. This procedure can be accomplished by placing elodea plants in water with baking soda to provide carbon. In this experiment spinach circles go through photosynthesis to produce oxygen. Background Knowledge: Photosynthesis â¦ 1. Light provides the energy needed for photosynthesis. The maximum rate is determined by the other factors involved. Our tips from experts and exam survivors will help you through. OXYGEN EVOLVED. Increasing the light intensity increases the rate of photosynthesis, provided plenty of carbon dioxide and water are available.   Privacy is being limited by the concentration of carbon dioxide. Light intensity can be calculated using this formula. A brief outline of various ways to measure the rate of photosynthesis - including measuring photosynthesis via the uptake of carbon dioxide (e.g. ${\text{Light intensity}}\propto\frac{1}{{\text{Distance}}^{2}}$. To measure the rate of photosynthesis, place a sprig of elodea in a test tube next to a light source and calculate the number of air bubbles coming out of the plant. Record your answer for use in a later question. We know it is not carbon dioxide because any further increase in carbon dioxide does not increase the rate of photosynthesis. Online shopping for the latest electronics, fashion, phone accessories, computer electronics, toys and more. In practical terms, this means that when the light is moved twice as far from the plant it will receive a quarter of the energy. Change lighting and availability of carbon dioxide to alter the rate of photosynthesis. The maximum rate is determined by the other factors involved. Time Duration/s (2 min.) This experiment involves the unit regarding photosynthesis. Photosynthesis - Photosynthesis SHORT ANSWER Experiment 1 Measuring the Rate of Photosynthesis Lab Results 1 What was the name of the plant you used to, 100 out of 102 people found this document helpful, Experiment 1: Measuring the Rate of Photosynthesis. There are a number of factors which contribute towards the process of photosynthesis. These include: 1) Measuring the uptake of CO2 2) Measuring the production of O2 3) Measuring the production of carbohydrates 4) Measuring the increase in dry mass We know it is not carbon dioxide because any further increase in carbon dioxide does not increase the rate of photosynthesis. While the drawings and observations can be made directly on the sheet, it is recommended that students enter this information in lab notebooks. Color of Light Color of light is same during the experiment and used same light source. Read the directions on the paper before starting. Photosynthesis Karen F. Adams Burnside Scholastic Academy 650 East 91st Place Chicago IL 60619 312-535-3300 Objectives: (Adaptable to grade levels 6-9) The student will: 1. Observe evidence of photosynthesis in a water plant. Calculate the change in volume for each, For example, if the volume at 5 minutes is 4 mL and the volume at 2 minutes 30 seconds was 3.6 mL, then the, change in volume for 5 minutes is 0.4 milk. Color of light affects the photosynthesis rate. Introduction: In this simulation, you will be looking at the production of oxygen as a plant photosynthesizes. It this case, number of bubbles of oxygen are counted given out in unit time by green aquatic plants like Hydrilla. Therefore, when the light is 20 cm from the plant, it will receive, $$\frac{1}{{0.2}{\text{ m}}^{2}}$$ = 25 arbitrary units, But when the light is 40 cm from the plant, it will only receive, $$\frac{1}{{0.4}{\text{ m}}^{2}}$$ = 6.25 arbitrary units. , eg temperature, light intensity and carbon dioxide concentration. What was the name of the plant you used to study photosynthesis? The evidence for this is that as the concentration of carbon dioxide is increased, the rate of photosynthesis also increases. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Record the temperature of each solution and check it at intervals throughout the experiment. // Provide alternate content for browsers that do not support scripting // or for those that have scripting disabled. Elodea 2. As with other chemical reactions, the rate of photosynthesis increases as the temperature rises. However, different light sources provide different initial values of lux, so the term âarbitrary unitsâ has been used in this example. The symbol â means âis proportional toâ, and distance is measured in metres. Investigating the Factors that Affect the Rate of Photosynthesis Aim: I will be investigating how light intensity affects the rate of photosynthesis, whether it decreases or increases the rate of photosynthesis. 2) Why not just measure the amount of sugar produced?   Terms. Photosynthesis is controlled by, if the temperature is too high. 2. After a period of time photosynthesis rate remains constant. Read about our approach to external linking. Correct answers: 1 question: Calculate the rate of photosynthesis (mm/hr) for elodea if when measuring net photosynthesis, the water level moved up 9mm from the initial level in 20 min and, when measuring cellular respiration it took 20 minutes for the water level to move down 1 mm. The rate of photosynthesis was measure by the amount of oxygen produce (cm3/min). In this lab, students calculate the rate of photosynthesis in an Elodea plant by changing the intensity of the ANSWER 1You can use a few things to measure the rate of photosynthesis. Distance of Light (mm) Bubble/minute 130 150 200 Once you have ï¬nished this data table, graph your results below in a bar graph. Read and follow the directions on how to use this lab simulator. Your answers will be recorded on paper, not electronically. Investigating the effect of CO2 concentrationon the rate of photosynthesis in Elodea What information from the graph can be used as evidence for this? 3) Based on the absorption spectrum of chlorophylls (refer to PPT 18), which color light (blue or red) would you predict would result in the highest rate of photosynthesis in Elodea? CO2 levels, Oxygen levels, are the most common. virtual chem lab answer key. Therefore something else must be preventing an increase in rate. The role of light in photosynthesis can be investigated in several ways. Fill in the table below with the results from the second experiment. The further the light moves from the plant, the fewer oxygen bubbles are produced by photosynthesis. In order for the spinach to gather light they have chlorophyll, a pigment that absorbs light to power photosynthesis.This experiment, because it uses CO2, regards the Calvin cycle.The Calvin cycle is the process of taking CO2 and fixating it into PGAL. rate of photosynthesis will _____. The factor which is working at the lowest level will usually be the, of the process. There are a few key methods to calculate the rate of photosynthesis. Measuring the rate of photosynthesis Factors limiting photosynthesis. Religious, moral and philosophical studies. Start studying Elodea and Photosynthesis Lab. There are a number of factors which contribute towards the process of photosynthesis. Cut elodea stems at an angle and use your fingers to crush the end of the stem. Place the sprig in a test tube, cut side up. Therefore something else must be preventing an increase in rate. U can place a plant in a secure â¦ There are several limiting factors which can reduce the rate of. Muhammad Ali Jinnah University, Islamabad, Muhammad Ali Jinnah University, Islamabad • BOTANY 301, Copyright © 2020. Answer to hello, i am conducting a lab in which i am measuring the rate of photosynthesis of a elodea lead. Cut the stem of an Elodea plant ... up in the tube then you have oxygen.ANSWER 2Hi photosynthesis measurer,Counting the air bubbles that are ... for measuring the rate of photosynthesis. This states that the intensity of light is inversely proportional to the square of the distance from the source. Green plant cells that are placed in the dark will not photosynthesis. The wavelength (color) of light absorbed by plant and rate of photosynthesis occurs at each wavelength in a different amount. What was the name of the plant you used to study photosynthesis? Key Concepts: Terms in this set (50) Experiment 2: Respiration in the Dark Divide the change in volume by the time, 2 min, to obtain the rate of oxygen production in units of mL/min. 2. 3. As a result, the rate of photosynthesis reaches its maximum at an optimum temperature, then decreases.
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