Photosynthesis and Cellular Respiration
1. Oh My Gas! (for investigating Photosynthesis)
2. Blow it up! (for investigating Anaerobic Cellular Respiration)
For Oh My Gas!:
Q1. Describe what you observed in test tubes A and B after 24 hours.
Q2. Explain the reason behind the change in color that happened to the solution after 24 hours.
Q3. Describe what you observed in the test tube after placing it inverted on top of the funnel with Hydrilla inside?
Q4. What does the presence of bubbles represent? What is inside the bubbles?
Q5. The purpose of adding sodium bicarbonate powder is to increase the amount of carbon dioxide in the water. What is the role of carbon dioxide in the process of photosynthesis?
Q6. Discuss the exchange of gases happening during photosynthesis (discuss the uptake and release).
For Blow it up:
Q1. What happened to the balloon in the setup containing water, yeast, and sugar? How about in the setup with water and yeast only?
Q2. What do you think is inside the inflated balloon? Predict its possible identity.
Q3. Describe the smell of the resulting solution and compare it to a commercial beverage.
Q4. The experiment is an example of a cellular respiration taking place, is the setup an example of aerobic respiration or anaerobic respiration? Why do you say so?
Q5. What is/are the starting material/s of anaerobic respiration?
Q6. What is/are the end product/s of anaerobic respiration?
1. All Science Fair Projects. <http://www.all-science-fair-projects.com/ phase2/app/webroot/files/image/ 00410/b1.jpg> accessed 23 May 2015
2. Biology Pre-IGCSE. <https://michelleswpr.files.wordpress.com/2013 /11/starch-test-boil-leaf-in-ethanol.jpg> accessed 23 May 2015
3. Blow up a balloon with yeast. http://sciencebob.com/blow-up-a-balloon-with-yeast/ accessed 23 May 2015
4. Duka, Ivan-Marcelo A., Maribel T. Joson-Villegas & Ma. Genaleen Q. Diaz. 2003. Biology 1 Laboratory Manual: An Investigative Approach. 7th ed. University of the Philippines Los Banos: Institute of Biological Sciences.
5. Olivares, Maria, Ma. Eloisa Bermio & Juanita Cruz. 2003. Science and Technology for the Modern World. Makati City: Diwa Scholastic Press Inc.
6. Photosynthesis. <http://mypages.iit.edu/~smile/bi9201.html> accessed 23 May 2015
7. University of the Philippines National Institute for Science and Mathematics education Development. 2009. Biology: Science and technology Textbook for Second Year. Mandaluyong City: Book Media Press, Inc.
PHOTOSYNTHESIS: Putting together carbon dioxide and water, using light, to produce food and oxygen
CELLULAR RESPIRATION: Breakdown of food molecule to release energy (ATP); Can happen in the presence or absence of oxygen
1. Farming practices
2. Food preservation
Slide presentation and activity sheets, for download, during the session: