In order for us to measure the rate of photosynthesis, we needed â¦ Respiration: oxygen + glucose -> carbon dioxide + water + heat energy, Photosynthesis: carbon dioxide + water+ light energy -> oxygen + glucose. What is Respiration in Plants. Add a 7 cm piece of Elodea to Tube 2. Demonstration of photosynthesis and cellular respiration in the aquatic plant Elodea using the pH indicator bromothymol blue (BTB). Describe how the rate of photosynthesis would compare to the rate of respiration and use this to explain why the bicarbonate solution turns yellow. It teaches key vocabulary such as leaf, stem, root, xylem, cellulose, chloroplast, photosynthesis and respiration, and the pronunciation. During photosynthesis, plants are using the energy of the sun to build molecules which effectively store this energy (glucose). Teaching Topics. Do air bubbles form everywhere? Photosynthesis occurs on the green parts of the plant that contain chlorophyll. ... Data Table 3: Gross Photosynthesis in Elodea. The hypothesis was, while CO2 is being given off during respiration, it can be re-utilized during photosynthesis. Obtain 3 pieces of Elodea about 6 cm in length and 2 pieces of aluminum foil. ADVERTISEMENTS: Expt. Known for its bright green color and leafy stems, E. densais an excellent oxygenating plant, making it perfect for use in freshâ¦ What observation supports this inference? a. ... Did this experiment support or refute your initialhypothesis. All Rights Reserved. Oxygen and carbon dioxide pass in and out of the stomata in the plants through diffusion. Some of the experiments are: 1.