Exercise and Cellular Respiration Lab ... and carbon dioxide in the time it takes bromothymol blue to change color. The pictures below show the setup for an investigation during which bromthymol blue was added to all the test tubes. ©2008 CIBT Photosynthesis and Respiration in Elodea – Teacher Section Page 2 Teacher Information Objectives: Through the investigation of the involvement of CO2 in the processes of photosynthesis and respiration in an aquatic plant, this lab is designed to demonstrate the following: 1. Some Important Background for Lab: Bromothymol Blue Indicator Reaction to Measure CO. 2. he following tests were set up; #1- 50 Ml of distilled water and 3 … Demonstrating Aerobic Cellular Respiration with Germinating Seeds. VIRTUAL LAB Carbon Transfer through Snails and Elodea Bromothymol blue (BTB) is an indicator that turns yellow in the presence of carbon dioxide. Next, they observe the carbon dioxide gas produced by yeast fermentation. Part 1: Elodea and Bromothymol Blue: 1. Experimental Project: Cellular Respiration Purpose Background Information Independant: resting vs. jumping jacks Dependant: heart rate (pulse), breathing rate, and time for bromothymol blue solution to change colour Control: same amount of BTB solution, students of same age, The pH indicator bromothymol blue is used to estimate the amount of CO 2 present in the vials. How are cellular respiration and photosynthesis alike? Bromothymol blue is a chemical How are they different? When CO ... Answer … Why is cellular respiration necessary for living organisms? blue and CO 2. O2 (released during photosynthesis) in solution. The purpose of this lab is to determine the effects of elodea on CO 2 levels and to observe evidence of cellular respiration and photosynthesis. PRE-LAB QUESTIONS. CO2 is consumed during photosynthesis 2. Cellular respiration occurred in the beans because the bromothymol in the cups changed color from blue to green. CO2 (needed for photosynthesis) and . Why do we need to breathe (don’t answer: “to live”)? First, students observe respiration in germinating seeds by detecting the carbon dioxide produced. LIGHT SETUP Describe the initial color of … bromothymol blue + O2 = blue color Label the … Use your background information AND your Cellular Respiration notes to answer the following 1. of cellular respiration? Bromothymol Blue (and indicator that changes from blue to yellow in the presence of carbonic acid) was used, Carbonic acid will be formed when high levels of Carbon Dioxide combine with water. Bromothymol blue works because it is able to detect the presence of . Label four test tubes: "control," "3 cm elodea" and "7 cm elodea." Have students observe the respiration of germinating seeds, using bromthymol blue as a pH indicator. The bromothymol we used changes color when a … Bromothymol Blue (which acts as an indicator to show if photosynthesis is occurring). 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