BIO 197 M3_L1_Gizmo_Simulation_Lab_ Photosynthesis_-_HONORS 2024 – University Of Nevada
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What did you eat for breakfast,
... [Show More] lunch, and dinner yesterday? Imagine that your body made its own food, internally. Sound crazy? Plants do this all the time.
Plants make their own food in a process called photosynthesis. In photosynthesis, plants use sunlight, carbon dioxide (CO2), and water (H2O) to make sugars, which provide them with the energy they need to live as well as the raw materials they need to grow. As a byproduct of photosynthesis, plants produce and release oxygen (O2).
A. Photosynthesis and Light Intensity
1. In the Gizmo™, observe the aquatic plant. During photosynthesis, the plant produces oxygen, which is visible as bubbles leaving the plant. Set the Light intensity to 0%. (To quickly set a slider to a specific value, type the number in the field to the right of the slider and press Enter.) Check that the Temperature slider is set to 30.0°C and the CO2 level is set to 500ppm. Then select the BAR CHART tab.
What is the rate of oxygen production? 0
What does this tell you about the rate of photosynthesis when no light is present? Explain your answer.
The rate of photosynthesis must be extremely slow since the lack of light intensity is causing no oxygen output.
2. Slowly drag the Light intensity slider up to 40%.
What happens to the rate of oxygen production as the light intensity increases?
The rate of oxygen production increases.
What does this tell you about the rate of photosynthesis as the light intensity increases?
As the light intensity increases the rate of photosynthesis increases.
Does increasing light intensity always have the same effect on oxygen production? In other words, experiment with the light slider to see if there are there certain light intensity changes that have no effect at all?
Describe what you see.
Up to around the values of fourties it is an increase of oxygen production but above that shows the oxygen stops increasing.
3. Select the TABLE tab. You will now use the table to record data on oxygen production at different intensities of light.
4. Set the Light intensity to 0%. Click on the Record Data button to record this information in the table. Increase the light intensity in increments of ten up to 100% and record data each time.
Does your data agree with your findings in step 2c? Explain why or why not.
My data does agree with my findings as it shows the oxygen levels stop growing on fourty. [Show Less]