Also, if the light is closer, the process will be faster. Record the initial color of the bromothymol blue solution. It is true that if we left the lamp in a position of 5cm distance, same result could have been given faster. Here you can order a professional work. I first did some research on the elodea plants niche. The purpose of this experiment is to see under what conditions the elodea plants grow and photosynthesize the best. Place one uncovered plant and the covered plant under the light without any colored film. Sorry, but copying text is forbidden on this website. This lab involves the qualitative measurement of the changes in carbon dioxide concentration associated with respiration and photosynthesis in the freshwater plant Elodea. In this experiment, the student will place aquatic plants under different colors of light in a solution of bromothymol blue. Make sure that each piece looks healthy and has plenty of green leaves. (2017, Mar 10). I also realised that my plants are dying because of the high temperature produced by the 100 watt lamp. 1) Cut a segment of the Elodea plant approximately 8cm with scissors. Overall results are that after 9 minutes (3 minutes intervals between the light distance), the solution gave off 4 bubbles. So I predicted that the plants under blue and purple colour cellophanes will have a higher photosynthetic rate. Record the final color of the bromothymol blue solution for each color of light, as well as both controls. The bubbles counted were. She'll show off her science knowledge as she answers questions to complete the crossword puzzle. Be sure that the film is heat resistant to avoid fire hazard. This experiment was consisted of 4 different colours of light, Blue, Green, Red and Purple. ... not fall over. The rate of photosynthesis is determined by the number of bubbles formed by the Elodea plants. Hypothesis: Yes, light intensity does affect the rate of photosynthesis. 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. Elodea, an aquatic plant available at many pet or gardening stores, Bromothymol blue solution (acid-base indicator available for purchase online) 0.04% (Aqueous), 1 L Bottle (1-2 bottles), Transparent plastic films of different colors (heat resistant), Clamp lights (one for each color and one additional for the control), Test tubes or small glasses (one for each color and two additional as controls). In this experiment I wanted to find out in what condition the elodea plant can grow and photosynthesis the best. If you need this or any other sample, we can send it to you via email. Bromthymol blue is used as an indicator for the presence of CO2 in solution. I did some research on different light wavelengths and found out that the blue light has the lowest wavelength therefore it has more energy followed by purple, green and red. Cover each … Too much light may cause plants to "burn out" while too little light will not provide enough light for optimal photosynthesis activity. Does light intensity affect the rate of photosynthesis in Elodea plants? I find out that the elodea plant is a genus of aquatic plants. This lab will evaluate the optimal wavelengths and degrees of intensity during photosynthesis when chloroplast is exposed to light. I thought that the water in the container that had plant with the highest photosynthetic rate would become acidic because more carbon dioxide is produced by the plant in respiration. Plants have four types of pigments, namely chlorophyll, carotenoids, anthocyanins, and xanthophylls. How about make it original at only $13.9/page? Help your budding naturalist to learn about photosynthesis. Photosynthesis - Resources: Demonstrating oxygen formation during photosynthesis can be a tricky Place the 10 cm segment of elodea plant in each container. When CO2 dissolves in water, carbonic acid is formed. Place a stand next to each container; attach a 100 watt light bulb to each stand 20 cm above each container. I first did some research on the elodea plants niche. Graph). Grade Level: 7th - 10th; Type: Life Science. Keep the ice cream containers (filled with water) away from the socket. 7. During the experiment, I learned the role of Sodium Bicarbonate and that photosynthesis can happen very quickly. When CO2 dissolves in water, carbonic acid is formed. The results do not show the general relationship between light intensity and photosynthesis that could normally be seen had the experiment taken place without errors. The dependent variable will be the number of bubbles formed and floated to the top of the test tube. Green light has a shorter wavelength than the red light but it had a lower rate because chlorophyll, the photosynthetic site, reflects the green colour and absorbs all others. Care: Blades Biological provide care information for both the pondweeds Elodea and Cabomba. Putting in too much water.Putting in too much sodium bicarbonate.Elodea plant may be dry or not developed. Graph). Graph 1: Light Colour vs average number of bubbles per day (Table 1. A bromthymol blue solution, acidified to pH 6.0 by the addition of carbon dioxide produces a yellow color. Measure the ph of water in each container after 5 days. (Find a price that suits your requirements), The Term Paper on Photosynthesis Lab Report, The Term Paper on Light Quality On The Rate Of Photosynthesis Measure, The Essay on Plant Pigment Chromatography, The Term Paper on Spectrometer Experiment, Light Quality On The Rate Of Photosynthesis Measure, Emily Dickinson’s “A Certain Slant of Light” Analysis Essay. aquarium shops or pet shops that have aquarium section, and specialist How likely are you to recommend Education.com to your friends and colleagues? Place the remaining plants each under a colored lamp. What can be done to correct this is to poke small holes on the sides of the ice cream container; this will allow the air to circulate. Observe the plant without the use of the light source. 5) Place a light source 50cm away facing the test tube. Measure the ph of water using the ph meter. Elodea is native to North America and it is also widely used as aquarium vegetation. Here is an easy way to explain the process of photosynthesis to your first grader. Results/ data tableDistance from light source (cm)# bubbles / 3 minutes51101154Analysis & DataThe starter hypothesis is partially correct. Cover each ice cream container with a cellophane plastic (purple, blue, green and red). only the ones that floated to the top of the test tube. Initially I decided to measure the ph of water after 5 days but the results were not successful as you can see in my results table. Record the initial color of the bromothymol blue solution. Subject. After 9 minutes (“more time under light source”), there were more bubbles than at the beginning. In this experiment I use a plant called Elodea (pond weed). For all you mad scientists, here is a helpful lab safety 101! Place a small pinch of sodium bicarbonate into a test tube (this increases carbon dioxide in water) Fill the test tube with distilled water so that the stem is completely submersed. My first set of experiment was not successful at all; I got the same ph (8) after 5 days for all the different light colours and found out that the plants were getting damaged from the 100 watt bulb. I use this plant because it will grow in a wide range of conditions, from very shallow to deep water, and in many sediment types. 6) Turn on the light source and begin taking observations. Its distribution was aided by botanic gardens both in Britain and mainland Europe, and is now found widespread in all areas south of the Arctic, including Australia and New Zealand. My hypothesis was that after a bigger amount of time under the light, the plant will give out more glucose and O2. Certain wavelengths of light are used by plants more than others. A care sheet can be downloaded from them too. Since the oxygen bubbles are a product of photosynthesis, one can conclude that the more bubbles formed, the more photosynthesis occurred, thus increasing the rate of photosynthesis. Grade. Set up the lamps at least several feet apart and away from windows. Run a third 3 minute trail with at a 15cm distance from a light source and record results. Study the number of bubbles formed (dependent variable) as a function of time (independent variable) at various light distances from the test tube. The plants should all be 12 inches (30 cm) away from their lamp. Place a piece of elodea in each test tube or glass. To eliminate this built in error, what can be done is to order the plants ahead of time so that one store does not run out of the materials and so there will not be a need to go to another store. What gases are used by plants during photosynthesis? Time is the independent variable and will be measured with a stop watch. Run a second 3 minute trail at 10cm from light sources (lamp). In this experiment it happens to be the blue light, for it contains the most energy. The ice cream containers were sealed for 5 days so the level of carbon dioxide in the container was probably not enough to sustain photosynthesis and therefore causing the plant to produce fewer bubbles. Cut equal-sized pieces of elodea for each test tube or glass (about 3 inches in length). Elodea Photosynthesis Lab. (Find a price that suits your requirements), * Save 10% on First Order, discount promo code "096K2". We enable strictly necessary cookies to give you the best possible experience on Education.com. The data I collected and my graphs show that my hypothesis was right. Also, the plant was heated up towards the end and it gave results, even though the distance between the plant and lamp was greater. The less photosynthetic activity, the more acidic and yellow the bromothymol blue solution becomes as the plant produces carbon dioxide during cellular respiration. Elodea is a fast growing aquatic plant, it has a high photosynthetic rate and it leaves entirely under water but it can even continue to grow unrooted, as floating fragments. These pigments have different polarities and chemical properties. Cover each test tube or glass with plastic wrap. The last day the green light plants were all over the tray container. Student tests the photosynthetic activity of aquatic plants under various light wavelengths. This is probably caused by the lack of oxygen and carbon dioxide circulation inside the ice cream containers. The equation for photosynthesis is as follows: Carbon dioxide + water ->glucose + oxygen What could we do to improve Education.com? The ice cream containers were sealed for 5 days so the level of carbon dioxide in the container was probably not enough to sustain photosynthesis and therefore causing the plant to produce fewer bubbles. Demonstrating Photosynthesis: Writing in Grass, http://wardsci.com/product.asp_Q_pn_E_IG0015113, www.mysciencebox.org/files/bromthymol_blue.doc, http://www.amphi.com/teachers/crobson/files/BAAAB5B835C54A3BB7C470B96B082B19.pdf, http://www.msnucleus.org/membership/html/k-6/lc/plants/5/lcp5_3a.html. Help your child paraphrase this passage about photosynthesis. 1. It is native to North America and is an important part of lake ecosystems. These photons can cause electron excitation to ... ... technique used in plant nutrition experiment. Describe what each of your chromatography strips looked like. Copyright © 2020 Education.com, Inc, a division of IXL Learning • All Rights Reserved. Plants perform photosynthesis to create sugars and other organic compounds that they need to survive. Thus, these short wavelengths have more energy and thus are optimal for photosynthetic activity.
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