1985. Slice off a portion of the stem at an angle and lightly crush the cut end of the stem. 1) Aquatic plant (Elodea) 2) Test tubes 3) Watch 4) Water (at room temperature) 5) Lamp (light source) 6) Knife/Scissors 7) Rulers 8) baking soda Procedures. Question 24 . From the results that I collected in my log book for my second method it can be seen that the number of bubbles on the leaves of the plants generally decreased each day as the days passed. The graph should show an increase in arbitrary units the further away from the light source the beaker is because the greater the distance from the light source, the lower the light intensity and so less photosynthesis would take ... Another error that was in my experiment was the fact that the elodea plants were bought from two different stores. Abstract This study was undertaken to determine the relationship of different wavelengths of light and the rate of photosynthesis in spinach leafs. Prepare a graph of the collected data and analyze it. A light source is split (in the example by a prism). It can be seen from this table that the blue colour group had the most average Length grown (cm). The diagram given in this BiologyWise article is a small pictorial elaboration of the process of photosynthesis that will prove helpful for kids and teenagers to understand this vital process of the plant kingdom. Activity Option #3 â Role of Carbon Dioxide and Light (1) Set up the lamps at least several feet apart and away from windows. 11. Photosynthesis increases with the increase in temperature. I did 3 experiments so altogether I collected 9 results for every colour so I added all the 9 results and divided the outcome by 9. // Provide alternate content for browsers that do not support scripting // or for those that have scripting disabled. 3. I find out that the elodea plant is a genus of aquatic plants. 6. Elodea, genus of five or six species of submerged aquatic plants in the frogâs-bit family (Hydrocharitaceae), useful in aquariums and in laboratory demonstrations of cellular activities. In paper chromatography, the pigments will separate based on their ... Elodea often overwinters as an evergreen plant in mild climates (like New Zealand). BIO 101 Lab 08: Photosynthesis 6 I first did some research on the elodea plants niche. Like the Cathedral tunes, the light reminds her of desolation. The photosynthesis process rate varies from different wavelengths and intensities of light. Photosynthesis defines the process by which plants and some bacteâ¦ 3. This is the rate of photosynthesis at that particular concentration of CO2. Simple experiment to demonstrate oxygen production in pond weed. Waterfowl, especially ducks, as well as beaver and muskrat eat this plant. The aim of this experiment is to use two kind of spectrometer to identify the atomic spectra of different atoms. We learned to use the calibration curve obtained from a known spectrum or measure the angle of diffraction to find out the wavelengths of unknown spectral lines. Elodea High School Inquiry/Scientific Method Plants. Elodea. Plug the 100 watt light bulb into the socket and switch it on. Hypothesis: Yes, light intensity does affect the rate of photosynthesis. OXYGEN EVOLVED. Explanation. Start studying Elodea and Photosynthesis Lab. 4 cellophane plastics (red, blue, purple and green). It should be noted that I used a very dark blue cellophane colour; my purple cellophane colour was light so it is possible that if I used darker purple colour cellophane it might have produced a different results. only the ones that floated to the top of the test tube. Graph the results placing temperature on the x-axis. (My second method was successful). Does photosynthesis performed by elodea remove CO2 from the water? Plants have shown to produce more bubbles when, placed closer to a light source than further away. In order to test the light colour effect on the photosynthetic rate of the plant I decided to cover the ice cream container with coloured cellophane, I chose four colours Green, Red, Blue and purple. Because of this for my repeat I had to make some major changes, I removed the lamp and decided to measure the length grown in each segment of elodea after 5 days. The closer (from 50cm to 10cm) the lamp was placed to the test tube, the more bubbles formed over 60 seconds (from 110 to 201 bubbles). Before they begin the experiment, however, students must come up with a well-worded hypothesis to be â¦ Place a stand next to each container; attach a 100 watt light bulb to each stand 20 cm above each container. The rate of photosynthesis was measured every five min under light colors of white, green, red, blue and yellow under a light intensity of 2000 lux. I then filled each ice cream container with 500 ml of water and put above each container a 100 watt lamp attached to a stand distanced 20 cm from the container. This would then allow white light through but making the holes small and on the side of the container will reduce the amount of light through that is not of the colour group. These graphs have been plotted with rate of photosynthesis against the factor under investigation. Graph 1: Light Colour vs average number of bubbles per day (Table 1. You must cite our web site as your source. The, oxygen bubbles are a product of photosynthesis. Study the number of bubbles formed (dependent variable) as a function of time (independent variable) at various light distances from the test tube. And the number of bubbles on the elodea segment everyday. 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. It this case, number of bubbles of oxygen are counted given out in unit time by green aquatic plants like Hydrilla. 1. Observe the plant without the use of the light source. Photosynthesis Lab for AP biology where students use a sprig of elodea. It can even continue to grow unrooted, as floating fragments. The efficiency of photosynthesis can be measured, by the amount of oxygen bubbles formed during a given amount of time. These pigments have different polarities and chemical properties. Repeat at different lower CO2 concentrations by using different dilutions of a saturated solution. This activity will allow students to measure the rate at which the photosynthesis process occurs. 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. Graph) Discussion: In this experiment I wanted to find out in what condition the elodea plant can grow and photosynthesis the best. I decided to measure the ph of water after 5 days to see if there are any changes in ph. 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. (For my daily results refer to my log book). The data I collected and my graphs show that my hypothesis was right. 4. 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. 7) Count the number of bubbles generated the following intervals:10 second, 30 second, and 60 seconds for each trial. Does light intensity affect the rate of photosynthesis in Elodea plants? Because of this, the plants from one store can be of a completely different species than the plant of the other store. Free Samples and Examples of Essays, Homeworks and any Papers, Filed Under: Term Papers Tagged With: light. This experiment was consisted of 4 different colours of light, Blue, Green, Red and Purple. This is because these colours contain more energy, for according to the colour spectrum, they are of shorter wavelengths, and the shorter the wavelength, the more energy is present. 2. 7. 5. The Hydrogen Spectrum colour| Î¸2-Î¸1| (Î¸2-Î¸1)/2| Î»| accepted| difference| red| 46.483| 23.242| 657| 740| 11.2%| blue| 33.963| ... ... experiment, we will measure the photosynthetic rates of spinach disks under different wavelengths (blue, yellow, green, red and white) of light. I got the same ph 8 for all the containers. Recently there are ... light Waterproof caulking Methodology Preparation of the Nutrient Solution The nutrient solution will be stored in an appropriate container; ... every other day while the plants are still ... ... the exit of winter light at the end of the day in the same distant ... and joy. SURVEY . In this experiment I wanted to find out in what condition the elodea plant can grow and photosynthesis the best. IntroductionThis lab has been created in order to find what extent does distance from a light source (5cm, 10cm, and 15cm) affect the rate of photosynthesis (measured in bubbles / 3 min) in Elodea water plants. With the temperature rising to 35 degrees to 40 degrees, the photosynthesis rate also increases, but the rate dips beyond 40 degrees. under different wavelengths of light. The rate of photosynthesis is often measured at different wavelengths of light, using the same sample of plant pigments. Here you can order a professional work. The purpose of this experiment is to see under what conditions the elodea plants grow and photosynthesize the best. Change the conditions of photosynthesis by altering light intensity and carbon dioxide amount, and determine the effects on the photosynthesis rate. In this experiment it happens to be the blue light, for it contains the mostÂ energy. Tags: SB1.e . It is native to North America and is an important part of lake ecosystems. Does cellular respiration occur at a higher rate than photosynthesis in the tube with only elodea? (2) Pour equal amounts of bromothymol blue into the test tubes or glasses (about 2/3 of the test tube or ½ cup in a small glass). 9. The results from my very first experiment were unsuccessful. This lab involves the qualitative measurement of the changes in carbon dioxide concentration associated with respiration and photosynthesis in the freshwater plant Elodea. An Analysis and Evaluation of Data from Photosynthesis Experiments Graph analysis This is my analysis for the investigation in to the affect of light intensity on the rate of photosynthesis to the Canadian pondweed, elodea. This lab will evaluate the optimal wavelengths and degrees of intensity during photosynthesis when chloroplast is exposed to light. 4. Then a comparison can be made between the similarities of aquatic photosynthesisÂ and growth to that of terrestrial plants. The bubbles counted were. 2) Crush the end of the stem at the site of incision gently. I predict that the plant under blue and purple light will have a higher photosynthetic rate because according to the colour spectrum, they are of shorter wavelength thus they have a higher energy. Fill each ice cream container with 500 ml of water. How ever the green light photosynthetic rate was lower than the red light photosynthetic rate. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product. It is the simplest method. (series). Graph). Simple experiments carried out by scientists shows that the rate of photosynthesis is critically dependent upon variables such as temperature, pH and intensity of 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. I also realised that my plants are dying because of the high temperature produced by the 100 watt lamp. The last day the green light plants were all over the tray container. The feeling of ... no definitive answers in regards to the light or the speakerâs internal despair. This explains why the Elodea plants are green. Too much light may cause plants to "burn out" while too little light will not provide enough light for optimal photosynthesis activity. These graphs have been plotted with rate of photosynthesis against the factor under investigation. I repeated the experiment, but this time I decided to remove the 100 watt lamp and instead of measuring the ph of water measure the number of bubbles on each plant everyday and on the fifth day the elodea segments were removed from the container, measured and recorded again to see the amount grown (in length) during the five-day period. Thus, these short wavelengths have more energy and thus are optimal for photosynthetic activity. Dissolved Oxygen production of . The purpose of this experiment is to find out under what wavelength (different colour of light) the elodea plants are able to grow and photosynthesise the best. Keeping that in mind I set up an experiment to find out under what light colour (blue, green, purple and red) elodea can photosynthesis the best. The photosynthetic rate is usually measured indirectly by detecting the amount of carbon dioxide released by plants. 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. ): To correct for this representation of the data and present a graph that shows increasing rates of photosynthesis with a positive slope the ET50 term can be Graph the â¦ 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. To accomplish this, the plants were subjected t different light colours (Blue, Green, Red and purple). In the results the pattern is that when the light intensity is higher the readings are generally higher. Lab room light will be used for the control light. Elodea plants are native to the New World, though a number of species have established themselves as invasive Plants have four types of pigments, namely chlorophyll, carotenoids, anthocyanins, and xanthophylls. Sign in|Recent Site Activity|Report Abuse|Print Page|Powered By Google Sites, Light Intensity and Rate of Photosynthesis (Carol Cao), The rate of photosynthesis is determined by the number of bubbles formed by the Elodea plants. From the results that I collected in my log book for my second method it can be seen that the number of bubbles on the leaves of the plants generally decreased each day as the days passed. ... are absorbed by the photosynthetic pigments in plants. The above is the method I used for my first set of experiment. At low temperature, the enzyme does not have enough energy to meet many substrate molecules, so the reaction is slowed. The blue and purple colour produced a higher number of bubbles and the elodea segments under blue and purple colour length growth was also higher, as you can see in my results table. They use this technique to compare the amounts of photosynthesis that occur under conditions of low and high light levels. 8) Repeat steps one through seven for the following light distances: 9) Lastly, lab room conditions will be used as the control group. Time is the independent variable and will be measured with a stop watch. 2) Crush the end of the stem at the site of incision gently. It can be seen from this table that the blue colour group had the most average bubbles per day. The mixtures of DCPIP with water, PO4 buffer, and chloroplast will be prepared in a number of cuvettes. Graph 2: Light colour vs length grown (cm), (Table 2. Elodea is native to North America and it is also widely used as aquarium vegetation. Here you can order a professional work. Materials Needed: (For each group of four students) elodea (water plant) lamp (40 watt) Silty sediments and water rich in nutrients favour the growth of American waterweed in nutrient-rich lakes. 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.