Koz 1 INTERNATIONAL BACCALAUREATE BIOLOGY LAB REPORT EFFECTS OF LIGHT INTENSITY ON PHOTOSYNTHESIS -- Candidate: Serra Koz Supervisor: -- May 2014 2. Then cover Tube 2 with tinfoil and place it in the test tube rack. Cover Tube 1 with tin foil (there is no Elodea in Tube 1) and place it in the test tube rack Add a 7 cm piece of Elodea to Tube 2. ________________________________________________________________________________________________________________________________________________________________ What happened to the color in Test Tube 2? This simulation requires students to collect data and draw conclusions. Background: Photosynthesis is the cellular process in which autotrophs capture light energy and convert it to chemical energy (glucose) using carbon dioxide and water. When we observed Elodea under water, what gas was visibly bubbling from its stem? It should be a blue solution. The independent variable is? Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product. Because the leaves of Elodea are only a few cells thick, they will be easy to observe under the microscope to look at cells and cell parts. Increasing the distance of light from the Elodea causes what type of change in the number of bubbles produced? Demonstrate that environmental CO2 is used during photosynthesis in Elodea. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Place the entire test tube rack under a light source and allow to sit overnight. ™! ¥ Then place it in the test tube rack. Share this science project . K ô Which organelle in plants is responsible for photosynthesis? Ø 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). 1. This allows the students to focus on only one process -- either photosynthesis … Using a straw, GENTLY blow into the solution causing it to bubble for approximately 1 minute. Q. &. Procedure: Pour 75 mL of water into a 250 mL beaker. : KF ÓG Œ °H 0 àH kF ø dM é! Ç Bromothymol blue works because it is able to detect the presence of CO2 (needed for photosynthesis) and O2 (released during photosynthesis) in solution. // Provide alternate content for browsers that do not support scripting // or for those that have scripting disabled. _________________________ What gas do plants give off? Elodea, a light bubbles where faster the closer the light got. Grade Level: ... She'll show off her science knowledge as she answers questions to complete the crossword puzzle. In this experiment, we will be using the same plant you examined in Lab 3 called Elodea. ________________________ ________________________ ________________________ Write the overall equation for photosynthesis. Explain your prediction. _________________________ List three things that a plant needs to undergo photosynthesis. Using your straw, GENTLY push the Elodea to the bottom of the test tube. Adjust your solution as necessary and place in dropper bottles for lab teams to use. Elodea Photosynthesis Lab. Explain why you obtained the results that you did. Materials: Sprig of Elodea Distilled Water w /Baking Soda Test Tube or clear glass Timer or Watch ™! Rachel Stagg Bio 101 Photosynthesis Lab Report Photosynthesis is a reaction that occurs inside the chloroplast with the equation: CO2 + H2O (CH2O) + O2. ____________________________________________________ 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. More specifically, you will learn how the amount of light affects photosynthesis. ______________________ ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Predict what color Tube 1 will be after the experiment. In order to do this, you will use an . ™! Worksheet. In preparation for the lab, purchase and then pre-cut sprigs of elodea. __________________ Predict what color Tube 2 will be after the experiment. The chemical reaction for photosynthesis W photosynthesis-and-respiration-in-elodea-answer-key-cornell 1/5 Downloaded from ny.hearstfdn.org on December 20, 2020 by guest [EPUB] Photosynthesis And Respiration In Elodea Answer Key Cornell When people should go to the books stores, search instigation by shop, shelf by shelf, it is essentially problematic. = ? To aid understanding, photosynthesis can consider in two stages. Koz 2 BACKGROUND INFORMATION Photosynthesis is a complex series of reactions catalysed by a number of different enzymes. This procedur can be accomplished by placing elodea plants in water with baking soda to provide carbon. …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. 3 (If it stays blue, the BTB is too concentrated; if it turns yellow, the BTB is too diluted.) ___________________________________________________ _________________________________________________________________________________ Compare the Elodea in the dark to the Elodea in the light. ± 742 Public Schools 2. × 6 Explain why you obtained the results that you did. ‡ Purpose: To find out how the Elodea cell looks like and study it under magnification and compare it to different cell parts under a microscope. So in this lab it was to show us how things would change in the plant. Summary: This lab that we did was to see what would happen to see what would happen to the Elodea plant if we put a different substance in our beakers. Science . Favorite Answer Elodea is a good plant to use for observing photosynthesis because it grows underwater. Science project. ° _H aH aH aH aH aH aH $ HJ R šL Ê …H b ™! Use evidence from your investigation to support your answer. Learn vocabulary, terms, and more with flashcards, games, and other study tools. In this lab, the purpose was to figure out how much photosynthesis was occurring in the test tubes with the elodea plant and the control. Divide the class in half and have lab groups in each half address either “Purpose A,” dealing with the use of CO2 by Elodea during photosynthesis, or “Purpose B,” demonstrating the production of CO2 during plant respiration. In this lab, you will investigate the process of photosynthesis. 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