Remove several leaves from around the cut and of the stem. Be sure to completely seal the vessel to keep gas from entering or leaving. Put both an aquarium fish and an elodea in the mixture. This is because when the carbon dioxide in our breath reacts with the water it forms carbonic acid, lowering the pH. When the pH is above a 7 basic it is blue, but when the pH drops below 7 acidic it starts to turn yellow. The materials we used to conduct this experiment were 1 test tube, 8g of sugar, and a heat source. Plants produce food in the form of simple sugars carbohydrate.
The production of oxygen, is used as an indirect measure of photosynthetic activity. Certain wavelengths of light are used by plants more than others. This is due to the fact that animals respire in the form of carbon dioxide, which in water becomes carbonic acid. How long would the plant need to photosynthesize to produce one liter of O2? Chlorophyll absorbs the energy of sunlight. The next day we came in and saw both flasks were a shade of bluish green somewhere in the middle of where the two flasks began. Calculate your Rf values based on your paper strip results, and record them inTable 1. We already know that carbon dioxide causes the solution to turn yellow.
Chlorophyll is a pigment in the chloroplast of the plant cell that absorbs energy from light and uses it to create compounds needed in photosynthesis. When carbon dioxide is in water it produces carbonic acid. This food can be used immediately, stored for later use, or used by other organisms. What process is occurring in the firsttrial without the aluminum foil? I had trouble finding snails in Arizona, so I went to my local pet store and picked up two feeder goldfish. If they don't have elodea, any other aquatic fish tank plant will work fine, but make sure it is a tall skinny plant that will fit down into your test tubes.
From where was this molecule derived? What gas is produced and responsible for this change? One nugget of information you will need to know- pet stores call it anacharis, not elodea. Exercise2:ConversionofLightEnergytoFoodby Plants Qu estions A. Please let me know if you are interested in being part of this roundup. Accordingly we should think that the Gauss-Markov theorem only holds in the never-never land. That light energy is converted to chemical energy through the steps of photosynthesis.
Leave one lamp without a colored film as a control. The procedure for this would be to leave the Elodea plant in water with sodium bicarbonate baking soda increases carbon dioxide in water , set up the lamp at 5cm distance and start the timer for 3 minutes. What molecule was produced by the Elodea while it was exposed to light? When complete, the bar graphshouldclosely resembletheactualchromatograph. I filled up two large Erlenmeyer flasks with water and bromothymol blue, and turned one yellow. Write a hypothesis to explain which color light will be best for photosynthesis and why. Proposeanexperimentsimilar to the one that you just performed that could be used to support your hypothesis.
During autumn and winter chlorophyll is not produced allowing the other pigments of brown and red to predominate giving plants their autumn colors. The key concept for this investigation is that plants use carbon dioxide, water and sunlight to make glucose, oxygen and water during the process of photosynthesis. The carbon dioxide comes from the fish breathing. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product. The teacher may then lead a discussion on student results and their meaning.
As the solvent moves up the paper, it carries along any substances dissolved in it. Photosynthesis reduced the amount of carbon dioxide in the atmosphere, as oxygen was continually being released. Answer to question 5: The purpose of photosynthesis is to make organic molecules sugars. Secure the film with tape. Make sure that each piece looks healthy and has plenty of green leaves. The reactions of photosynthesis can be divided into two major types: light-dependent reactions and light-independent reactions.
In this experiment, the effects of photosynthesis and respiration of Elodea caused by different temperatures were studied. For one of the control plants, cover the test tube or glass completely with aluminum foil to block out any light. Gently blow into the tube using a straw until it changes color to yellow. ¾ of a 500mL beaker was filled with tap water 3. Now add a sprig of elodea. Method: The following materials were required for the experiment: A green sprig of Elodea Lamp Water Sodium Bicarbonate baking soda Beaker Pen Paper Power source The following procedures were required for the experiment: Obtain a green sprig of Elodea.
So here is a lab that I created based off of the observations and facts. A glass funnel was placed in the beaker, along with the elodea as shown in the apparatus above 4. Bromothymol blue is an indicator solution to those used to test for food nutrients. What do plants need to live? Carbon C was shown as a black solid 2. Write an equationfor the reactionthat explains the color change. The less photosynthetic activity, the more acidic and yellow the bromothymol blue solution becomes as the plant produces carbon dioxide during cellular respiration. Hypothesis: The higher the light intensity the faster the rate of photosynthesis as this provides more energy available for plants photosynthesis to take place.
V ersion42-0103-00-01 L a b Report Assistant Thisdocumentisnotmeanttobeasubstitute foraformallaboratoryreport. Along with these organelles you will be discussing photosynthesis and cellular respiration. However, I frequently get questions about the lab so I'm hoping this blog post will be useful to those teachers out there who about to set up this lab. I have not done this activity in the past. ~ Ecology unit: During my ecology unit, we cover the 3 major biogeochemical cycles water, carbon, and nitrogen. There are different types of chlorophyll, but the one involved in photosynthesis is called chlorophyll-A.