It turned blue because the plant removed all of the Carbon Dioxide from the environment What happened in the test tube with only Elodea in the dark? <> ™! (In a beaker of 200mL of water, I add about 4mL of bromothymol blue). Thus, the more photosynthetic activity, the less acidic and more blue the bromothymol blue solution becomes as the plant uses carbon dioxide during photosynthesis. Explain your prediction. 2. Label four test tubes: "control," "3 cm elodea" and "7 cm elodea." __________________ Explain your answer. Explain why you obtained the results that you did. _________________________ What gas do plants give off? bromothymol blue + O2 = blue color. Photosynthesis Lab In Elodea Plant Elodea & Photosynthesis Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product. This lab involves the qualitative measurement of the changes in carbon dioxide concentration associated with respiration and photosynthesis in the freshwater plant Elodea. Add a 7 cm piece of Elodea to Tube 3. Abstract: This lab involves the qualitative measurement of the changes in carbon dioxide concentration associated with both respiration and photosynthesis in the fresh water plant Elodea. Image below is courtesy PureySmart on Wikimedia Commons. W 8. ™! …H b b Ò Ò ¥ šH ç" ç" ç" ™! Bromthymol blue is used as an indicator for the presence of CO2 in solution. endobj Photosynthesis and cellular respiration are key processes in maintaining this balance. Record the color of the solution in the data table in the question section of this lab. Elodea in the classroom. the carbon dioxide produced by the snail is soaked up by the elodea due to photosynthesis, therefore the water is able to remain that blue … The bromothymol blue will not interfere with respiration or photosynthesis in Elodea. Elodea & Photosynthesis Light, Photosynthesis, Carbon Dioxide and Bromothymol Blue Research Question: Will the amount of light an aquatic plant receives affect the level of carbon dioxide in the water around it? Slice off a portion of the stem at an angle and lightly crush the cut end of the stem. 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 absorption of Co2 from water by the elodea in light is revealed through the change in color of the bromothymol blue from blue … J ùõùëáİÖİÖİÖİÖİÖİÖİÖÎİÖÎİÖİÖİÖİÖÎĽÖÎÄÎÖİÖ½µ½­½µ½­¦œõ•õ•œ h=]ú h˜ò h=]ú h˜ò 5�>* h=]ú hÜ\ü hÜ\ü hÜ\ü 6�hÜ\ü hÜ\ü H*hÜ\ü hÜ\ü hÜ\ü hÜ\ü 5�H* hÜ\ü hÜ\ü 5�hğ~L hÜ\ü hÜ\ü hÜ\ü h=]ú 5�>* h=]ú h=]ú 5�>* h=]ú h=]ú h=]ú 8 7 ’ “ Ÿ d Name: Zander Cosey :Date_____ Period: 6 Cellular Respiration Virtual Lab Carbon Transfer through Snails and Elodea Background: All organisms are dependent on a healthy carbon dioxide-oxygen balance. Elodea and Bromothymol Blue. Fill vial # 4 with tap water and add one dropper full of bromothymol blue. Photosynthesis lab with elodea and bromothymol blue >>> CLICK HERE Colorado state university application essay Get photo essays and pictures related to syracuse central new york news, sports, entertainment and more at syracusecom. Bromothymol blue works because it is able to detect the presence of . This inquiry-based activity is hands-on for students and allows them to investigate photosynthesis by determining whether plants consume or release carbon dioxide. Using your straw, GENTLY push the Elodea to the bottom of the test tube. In a test tube, you will see that: bromothymol blue + CO2 = green color bromothymol blue + O2 = blue color Equation: Write the equation for photosynthesis. b Ò b Ò _H ç" ™! Tube 1 Tube 2 Tube 3 No Elodea Elodea Elodea + + + Covered in tinfoil Covered in tinfoil In the light Pre-Lab Questions: Predict what will happen to the color of the solution when you blow into the straw (causing the bromothymol blue + water solution to bubble). 5. Í This will cause a color change from a green/blue to yellow. ™! This lab is meant to be explored before teaching photosynthesis. Background Facts: Carbon dioxide in water produces carbonic acid. ™! 2. Bromothymol blue. Elodea and Bromothymol Blue Photosynthesis is the process by which plants take carbon dioxide from the atmosphere, add water, and use the energy of sunlight to produce sugar. ĞÏࡱá > şÿ ^ ` şÿÿÿ ] ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿì¥Á @ ğ¿ £ bjbj)) +: Kz Kz £ ÿÿ ÿÿ ÿÿ ˆ b b b b b b b v ^ ^ ^ ^ $ ‚ D v àH h Ò Ò Ò Ò Ò ™! Place 90 mL of distilled water into a 150-mL beaker. Bromothymol blue works because it is able to detect the presence of . Pre-AP Photosynthesis Lab - Elodea & Bromothymol Blue. The point is to determine whether the elodea will have an affect on CO 2 levels. ™! Biology Name _____ Photosynthesis Lab - Elodea & Bromothymol Blue Period _____ Date _____ Background: In this lab, you will investigate the process of photosynthesis. As a result, an acid-base indicator such as bromothymol blue can be used to indicate the presence of carbon dioxide. Adjust your solution as necessary and place in dropper bottles for lab teams to use. It starts as a blue solution in water, and turns yellow in the presence of carbon dioxide. In a test tube, you will see that: bromothymol blue + CO2 = green color Search. A post-lab class discussion would include the sharing of information between the two groups. Explain why you obtained the results that you did. Place a 6 cm Elodea stem with leaves in vials #1, 2, 4 and 5. &. In order to do this, you will use an Elodea plant, the chemical More specifically, you will learn how the amount of light affects photosynthesis. Carbon… Bromothymol blue is an acid-base indicator that turns yellow in acidic solutions and blue in alkaline solutions. ™! Background: In this lab, you will investigate the process of photosynthesis. ________________________________________________________________________ _________________________________________________________________________________ What gas (or gases) can bromothymol blue serve as an indicator for? Ø Using the eye dropper, add about 100 drops of the bromothymol blue into each of the test tubes. %���� 2. Write the equation for photosynthesis: Photosynthesis occurs in the chloroplast, an organelle in plant cells that contains the molecule chlorophyll. ± ���o�@��U3����� �s���HF��е�>,Ae��k@��[c��U]y��VV�o�p�. A small piece of elodea will be introduced to a solution containing bromothymol blue and CO 2. Before beginning the lab, I like to demonstrate to the students how bromothymol blue works. _________________________________________________________________________________ S T “ � Ÿ ´ Á Ğ Ş ß à â ò ü ı @ G Y e g t „ †   ¡ Ç È Ü á Write the equation for photosynthesis: Photosynthesis occurs in the chloroplast, an organelle in plant cells that contains the molecule chlorophyll. Elodea and Bromothymol Blue are often used in classrooms to demonstrate that plants use carbon dioxide during photosynthesis. Elodea and Photosynthesis Lab •Background Information: –Photosynthesis Equation: CO 2 + water + light → glucose + oxygen –Bromothymol Blue (BTB) – a chemical indicator used to detect weak acids and bases. Î Ï Ú ô ì `' C“ ì `' C“ ôÿ `' åÜ ä `' C“ ä `' C“ ôÿ `' åÜ Òÿ `' ê Òÿ `' ê Çÿ `' åÜ ì `' C“ ì `' C“ Çÿ `' åÜ ôÿ `' ɹ Çÿ `' åÜ ì `' C“ ì `' C“ ¸ÿ `' åÜ © `' C“ $ K ô We plugged the cylinders with stoppers and waited 48 hours to see the difference in bromothymol blue. CO2 (needed for photosynthesis/simple sugar production) and . It should turn greenish. Bromothymol blue 2 aquarium snails 2 elodea (aquarium plant) pond water 4 beakers light lamp Procedure: 1. ____________________________________________________ Hypothesis: ________________________________________________________________________________________________________________________________________________________________________ Material Preparation: If concentrated bromothymol blue (BTB liquid) is available, dilute with water (distilled works best) and test the concentration by adding 10 ml of your BTB solution to 15 ml water and bubbling one lung full of air through a straw into the water. __________________ Results: Record your results in the table below. Then cover Tube 2 with tinfoil and place it in the test tube rack. ______________________ ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Predict what color Tube 1 will be after the experiment. … <>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> In this class we learn to do multiple experiments. students will be able to "see" photosynthesis in action as colors change (or don't) using Elodea, bromothymol blue, and carbon dioxide.This is a 3 page lab with background info, materials list, clear pr In this inquiry lab, students design and conduct simple experiments using elodea and Bromthymol blue to determine whether plants consume or release carbon dioxide in the process of photosynthesis. Ç ° Water mixed with the bromothymol blue with the snail and the elodea is blue-green in the light and yellow when in the dark for three hours. …H …H v v „ ú d Ñ" v v ú Biology Name ____________________________________ Photosynthesis Lab - Elodea & Bromothymol Blue Period ___________ Date ___________________ Background: In this lab, you will investigate the process of photosynthesis. 7. ç" ™! 4 0 obj Fill vials #1, 2, 3 and 5 with this CO 2 enriched solution containing bromothymol blue. Purpose: In this lab you will observe the interaction of a snail and a water plant in a closed environment.
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