Demonstrate that environmental CO2 is used during photosynthesis in Elodea. Obtain 3 pieces of Elodea about 6 cm in length and 2 pieces of aluminum foil. 2. This lab involves the qualitative measurement of the changes in carbon dioxide concentration associated with respiration and photosynthesis in the freshwater plant Elodea. Egeria densa, also known as Elodea densa because of its previously incorrect classification in the Elodea genus, is the most popular aquatic plant used to teach photosynthesis in the classroom. Introduction: In this report you will develop an understanding about what elodea is and the role the abiotic factors of the environment (sunlight, pH, and the deoxidized water) play in changing the biotic factors of elodea, effecting: growth, color, and node development. This experiment is a continuation of the experiment "Oxygen Production in Elodea in Direct Light, Distant Light, and Darkness." Label 4 screw cap tubes 1, 2, 3 and 4 with a marker and line them up in order in a test tube rack. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Jackson, Malcolm Elodea Lab Experiment Report TA: Jessica April 14, 2015. Originally from Brazil, E. densa has spread to temperate regions on all of the continents except Antarctica. 3. More specifically, you will learn how the amount of light affects photosynthesis. Lesson organisation The work could be carried out individually or in groups of up to 3 students (counter, timekeeper and scribe). In this experiment, the light intensity is changed by changing the distance of the source of light closer or further away from the elodea, so theoretically, when the intensity becomes stronger due to the light source being closer to the Elodea, the rate of photosynthesis should increase and therefore the number of oxygen bubbles will increase too. Students learn a simple technique for quantifying the amount of photosynthesis that occurs in a given period of time, using a common water plant (Elodea). Elodea High School Inquiry/Scientific Method Plants. 91 Exercise 1 – Observing Photosynthesis via CO 2 Consumption 1. They use this technique to compare the amounts of photosynthesis that occur under conditions of low and high light levels. Fill a 250 ml Erlenmeyer flask to the 100 ml line with tap water, then add 5 ml of phenol Page 3 of 4 Bio-Logic LAB Plant Experiment: Homeostasis, Osmosis, Photosynthesis Mr. Galloway www.soulcare.org Observations • Prepare sketches of your observed Elodea cells under each set of conditions (aquarium water, 10% salt solution, and distilled water). In this experiment the rate of photosynthesis is measured by counting the number of bubbles rising from the cut end of a piece of Elodea or Cabomba. Before they begin the experiment, however, students must come up with a well-worded hypothesis to be … Photosynthesis Lab - Elodea & Bromothymol Blue Period _____ Date _____ Background: In this lab, you will investigate the process of photosynthesis. The rate of photosynthesis varies greatly with changes in wavelengths of light. Light's colour is determined by its wavelength of light, and thus it is possible to devise an experiment to determine which wavelengths of light are most productive for photosynthesis than others. In order to do this, you will use an . Bromthymol blue is used as an indicator for the presence of CO2 in solution. This experiment will look at the affect of light intensity on the rate of photosynthesis on Elodea plants. A Jar of Plant Life: The Elodea Experiment. The rate of photosynthesis is determined by the number of bubbles formed by the Elodea plants. Start studying Elodea and Photosynthesis Lab. 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