University:
Texas State University
Course:
BIO 1331 | Organismal Biology
Academic year:

2021
Views:

28

Pages:

1
Author:

Killian Mata

Activity A: Ideal conditions Get the Gizmo ready: ● Be sure that the BAR CHART tab is selected. ● Turn on Show numerical values. Question: In the Gizmo, what are the ideal conditions for photosynthesis? 1. Form hypothesis: During photosynthesis, light energy is used to synthesize carbon dioxide (CO2) and water (H2O) into glucose (C6H12O6) and oxygen (O2). The complex series of chemical reactions is summarized by the following formula: 6CO2 + 6H2O + light energy ฀ C6H12O6 + 6O2 In the Gizmo, what light intensity and CO2 level do you think will maximize the rate of photosynthesis? 55% light instensity. 2. Experiment: Use the Gizmo to find the ideal conditions for photosynthesis. Use any method you like. When you think you have the answer, list the conditions below. Temperature 24C Light intensity 55% CO2 level 430 PPM Oxygen production 43 ml/h 3. Revise and repeat: One way to test if you’ve found the ideal conditions is to change each variable slightly from the value that you recorded above. If the oxygen production decreases with each change that you make, it is likely you have found the ideal conditions. If a small change causes oxygen production to increase, continue to experiment. If necessary, revise your numbers in the table above. 4. Think and discuss: Think about the process of finding the ideal conditions A. Why would it be hard to find the ideal light intensity if the temperature were very hot or cold? The plant wouldn't even be able to start photosynthesis as a wrong temperature, so a change in light woldn't affect anyhting. B. Why would it be hard to find the ideal CO2 level if Light is required for photosynthesis, with improper light, photosyhtesis the light intensity were very low? wouldn't even begin regardless of a co2 change.