How does light intensity affect oxygen production? These include: 1) Measuring the uptake of CO 2. The reactions of photosynthesis can be divided into two major types: light-dependent 5. To improve results, add a pinch of baking soda to the water in the test tube. Introduction: Photosynthesis and respiration Photosynthesis is the process by which light energy is used to produce oxygen, glucose, and water from water and carbon dioxide. Lab 8: Determining the Rate of Photosynthesis in a Leaf. Conclusion: This section should summarize your overall findings and discuss any experimental errors or problems you encountered. Rate of Photosynthesis Lab: Exploring the Rate of Photosynthesis Photosynthesis is the process by which plants take carbon dioxide from the atmosphere, add water, and use the energy of sunlight to produce sugar. The Collaborative Rate of Photosynthesis Lab starts by asking users to enter a chat room number (which users of the SpeakUP already have). Photosynthesis occurs in the chloroplast, an organelle in plant cells that The with water, lamp. Select the BAR CHART tab. The equation for this process is: 6CO2 + 6H2O ---->C6H12O6 + 6O2 As the equation demonstrates an essential requirement for photosynthesis is CO2. The rate of photosynthesis is optimal at room temperaure (25 °C). In this experiment, the buoyancy of leaf disks served as a measurement of the net rate of photosynthesis within them. Instead of carbon dioxide, what will be used as the reactant in this lab? Design 1: Heat sinks (beaker with water) may not be necessary if using CFL bulbs. After discussing your plan with your instructor, perform your experiment. 1. leaves, etc.) Connection to Class Content: The rate of photosynthesis lab illustrates how photoautotrohs (such as spinach since spinach is a plant) photosynthesize to the effect of outside variables. Screenshots. and water. There are several ways of measuring the rate of photosynthesis in the lab. A measurement of respiration in the same system allows one also to estimate the gross production. - Versioon B, Kuidas Mõjutavad Valgustugevus Ja Temperatuur Fotosünteesi? 1. If there was a lower quality of light then photosynthesis would be slower compared to higher You may also include photos of your experiment. This lab was created to replace the popular waterweed simulator which no longer functions because it is flash-based. On the graph, notice the Oxygen production bar. However, at high intensities the rate of photosynthesis does not increase as quickly anymore. a. _____ Select the BAR CHART tab. Background: Photosynthesis is an anabolic process used by all photoautotrophs to capture light energy and convert it to the chemical energy in carbohydrates. bar. After a period of time photosynthesis … 4) Measuring the increase in dry mass. the rate of photosynthesis generally increases until limited by another factor. If you do not see bubbles right away, re-cut and crush the stems, experiment with moving the light closer to the apparatus or remove the heat sink if using CFL bulbs. oxygen 2. from carbon dioxide, in the process producing oxygen as a waste product. Gizmo, you can monitor the rate of photosynthesis by measuring oxygen production. Design an experiment to test your hypothesis. The light-dependent reactions convert Materials: test tube, Elodea cuttings, sodium bicarbonate (baking soda), beaker The bicarbonate serves as an alternate dissolved source of carbon dioxide for photosynthesis. Generally, the rate of photosynthesis is calculated by measuring the consumption of carbon dioxide. The lab allows a user to vary the light intensity and temperature conditions of an aquarium plant and observe how fast it is photosynthesizing. Based on the data collected, the distance the lamp was placed from the test tube with the Elodea plant in it did affect the number of bubbles that formed and floated to the top of the test tube. 6. On the graph, notice the . If the air and gases within the leaf disks are drawn … The leaf discs will float up because of the oxygen emitted by them as a waste product of photosynthesis, and this will help us conclude the photosynthesis rate based on how much oxygen is released by the discs and how much time it takes them to float to the surface. 3) Measuring the production of carbohydrates. light-independent reactions use that energy to make glucose from carbon dioxide Investigating the rate of photosynthesis. output PHOTOSYNTHESIS LAB :) BACKGROUND: All life on earth is powered directly or indirectly by photosynthesis. – Versio A, Kuidas Mõjutavad Valgustugevus Ja Temperatuur Fotosünteesi? Observe the left pane closely. This is also a good place to include any personal thoughts about your learning experience. rate of photosynthesis lab results. The rate of photosynthesis will increase with increasing light intensity. Consider environmental factors that you could manipulate during the lab. In the Photosynthesis Lab Gizmo, you can monitor the rate of photosynthesis by measuring oxygen production. Also, the net rate of photosynthesis is the rate of carbon fixation during photosynthesis minus the rate of CO2 simultaneously lost during respiration. © Next-Lab - Next Generation Stakeholders and Next Level Ecosystem for Collaborative Science Education with Online Labs. Move the Light intensity slider back and forth. 7. We hypothesized that as light intensity increased, the rate of photosynthesis would also increase . b. atmosphere, add water, and use the energy of sunlight to produce sugar. Lab Photosynthesis Laboratory objectives: Learn about photosynthesis. How does light intensity affect oxygen production? However, at high intensities the rate of photosynthesis does not increase as quickly … Rate of Photosynthesis of Spinach Leaves in Sodium Bicarbonate Solution Question: How do different factors, particularly temperature, affect the rate of photosynthesis of a spinach leaf? Count the bubbles to measure the rate of reaction. Like all enzyme-driven reactions, the rate of photosynthesis can be measured by either the disappearance of the substrate or the accumulation of product (College Board, 2001). Name:_________________________________________, Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Answer your experimental question or hypothesis by using your data to support or refute your claim (conclusion). The rate of oxygen production was measured by the amount of dicks that stated to float at a certain time. Photosynthesis is the conversion of light energy into chemical energy which is stored in the bonds of sugar. To prove that in order for photosynthesis to happen light is needed, and to see if temperature has an effect on how fast or how slow photosynthesis happens. The water in the beaker is meant to absorb the heat from the light. Light intensity . Factors affecting photosynthesis. What do you think the bubbles are? - Version A. seconds and high lux treatment took on average 432.6 +/- 267.9 seconds to notice disk flotation . Miten Valo Ja Lämpötila Vaikuttavat Kasvien Yhteyttämiseen? (This is not very much it is only about 1 gram of baking soda in 100 ml of water.) Discuss the experimental set-up and how it can be used to measure the rate of photosynthesis. It is safe to assume that green would have to lowest rate of photosynthesis because it is reflected by the leaves of plants and red/violet would have the highest rate of photosynthesis. These gases are what allow leaves to float in water. Chlorophyll absorbs the energy of sunlight. This lab is an abridged Html5 version of the Flash-based Photolab. This is an example of a common experiment used to investigate light intensity and the rate of photosynthesis. Generally in plants, photosynthesis involves green pigment chlorophyll and generating oxygen (O 2) as a secondary result. Photosynthesis Lab . Background Information: Chloroplasts are located in the cells in the center of a leaf, called the mesophyll, or “middle tissue”. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. – Versio B, Miten Valo Ja Lämpötila Vaikuttavat Kasvien Yhteyttämiseen? There are a few key methods to calculate the rate of photosynthesis. slider back and forth. If the water amount increases, then the photosynthesis rate will increase. 2. Hypothesis: I hypothesise that the rate of photosynthesis will be less for the green light whereas lights such as red and violet will have the fastest rate of photosynthesis. Please Login to Rate and Comment. - Versioon A, How Do Light And Temperature Affect Photosynthesis In Plants? Photosynthesis is the process by which plants take carbon dioxide from the The number of oxygen bubbles the plant releases per minute is a measure of the rate of photosynthesis. Prepare a 0.2% solution. Plot and interpret the data you obtain from your experiment. This lab is controlling the amount of light that the leaf will get and absorb and how that would affect the net rate of photosynthesis. 5. Your goal is to find a way to consistently measure the rate of photosynthesis using any of the designs above. It has been optimized to work with tablet computers. In this virtual photosynthesis lab, students can manipulate the light intensity, light color, and distance from the light source. Photosynthesis occurs in the chloroplast, an organelle in plant cells that contains the molecule chlorophyll. get custom paper. Record all data and determine if your data supports or refutes your hypothesis. That light energy is converted to chemical energy through the steps of photosynthesis. Because oxygen is one of the byproducts of photosynthesis, we can measure the rate of photosynthesis in leaves by observing the release of oxygen. Design an experiment to test how light affects photosynthetic rates. 111 08-01-17 Photosynthesis Lab Purpose: The purpose of this lab is to understand the process of photosynthesis and how sunlight effect has on it. Move the . S-7-8-1_Rate of Photosynthesis Lab KEY Rate of Photosynthesis Lab: Answer KEY Write the formula for photosynthesis here: CO 2 + H 2 O + light energy → C 6 H 12 O 6 + O 2 Now, write the formula in the form of a sentence: Carbon dioxide plus water plus light energy … But when we submerge leaf discs cut using a hole-punch in a baking soda solution, we can see the effect of oxygen gas being produced: the leaf discs begin to float. Cut elodea stems at an angle and use your fingers to crush the end of the stem. Rate of photosynthesis Intensity of light Rate of photosynthesis Why are labs and greenhouses better than gardens, woodlands and fields? Lamp intensity (Lumens): 1000 Temperature: 10 °C Number of bubbles: 0 With the members of your group, brainstorm variables which may affect the rates of photosynthesis. Normally, this would be difficult. Measuring the Rate of Photosynthesis Lab 7th Grade Science Unit 8. The lab allows a user to vary the light intensity and temperature conditions of an aquarium plant and observe how fast it is photosynthesizing. List any factors that you think may affect the rate of photosynthesis. -in a science lab/greenhouse: levels of CO2 can be increased artificially so CO2 is no longer a limiting factor and the rate of photosynthesis will increase. At low (10 °C) and high temperatures (40 °C) the rate of photosynthesis is not as efficient. Design 3: A marker can be used to measure the amount of oxygen in the test tube rather than measuring bubbles. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. How might you measure the rate of loss of carbon dioxide? on the rate of photosynthesis. Form a hypothesis to test your variable. 2) Measuring the production of O 2. What do you think the bubbles are? The speed of the oxygen production, otherwise known as rate of photosynthesis can be affected by many factors such as the … 4. (check with instructor about available materials) energy from the sun into a form that the chloroplast can then use to make sugar Students will work in small groups to design an experiment with one independent variable and test this variable on spinach leaf disks. 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. Light Intensity and the Rate of Photosynthesis. However, equipment and procedures to do this are generally beyond the reach of … Analysis & Conclusions. Controlled Variables Amount of Water/mL (230 mL) Amount of water measured by the graduated cylinder and used 230 mL water during the experiment. The punched out leaf disks will initially sink in a test tube of water but will float as photosynthesis occurs. 3. Procedure 1. Photosynthesis Experiment: Describe your experiment, include your hypothesis and data collected. Please instruct your students in the ILS that they will not see the lab without a chat room number. These include: the rate of oxygen. In this investigation, you measured the rate of oxygen production. As long as two users enter the same room number they will then share the same simulation. The rate of photosynthesis will increase with increasing light intensity. Photosynthesis takes place in the chloroplast and the number of leaves will affect the photosynthesis rate. As it is normally present in the atmosphere at very low concentrations (about 0.04%), increasing carbon dioxide concentration causes a rapid rise in the rate of photosynthesis, which eventually plateaus when the maximum rate of fixation is reached. Include the following sections in your lab report, which should be typed. Aim: Photosynthesis is the process when green plants use sunlight to synthesize its own organic matter from carbon dioxide (CO 2) and water (H 2 O). contains the molecule chlorophyll. It can be measured in a variety of ways. Our hypothesis stated that the cup with the greatest amount of baking soda would yield the fastest rate of photosynthesis. // Provide alternate content for browsers that do not support scripting // or for those that have scripting disabled. - Version B, How Do Light And Temperature Affect Photosynthesis In Plants? This activity will allow students to measure the rate at which the photosynthesis process occurs. Observe the left pane closely. B. Introduction: Explain photosynthesis and include the chemical equation. The number of oxygen bubbles the plant releases per minute is a measure of the rate of photosynthesis. Prepare 100 ml of bicarbonate solution for each trial. Purpose: The purpose of this investigation is to measure the rate of photosynthesis in spinach leaves by measuring the length of time it takes for leaf discs to generate enough oxygen to float. Oxygen production . Water used in photosynthesis. reactions and light-independent reactions. Mrs Peers-Dent shows you how to measure the rate of photosynthesis of pondweed. The Rate Of Photosynthesis: Lab report just from $13,9 / page. Watch the video that shows the set-up for the floating leaf disk lab at Bozeman Science.