Oxygen and CO2 Lab - SCN1340 Biodiversity Spring 2013...

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SCN1340 Biodiversity, Spring 2013 Oxygen and Carbon Dioxide Cycling Lab Type name (student 1): Class time: Honor Code statement (handwritten): I pledge my honor that I have neither received nor provided unauthorized assistance during the completion of this work. Signature: Date: Type name (student 2): Class time: Honor Code statement (handwritten): I pledge my honor that I have neither received nor provided unauthorized assistance during the completion of this work. Signature: Date: Abstract (150 words; 10 points) See Blackboard for guidelines on writing abstracts The purpose of the lab was to compare the amount of oxygen gas and carbon dioxide consumed or produced by a plant during respiration and then by photosynthesis. Photosynthesis is the process in which light energy converts water and carbon dioxide into oxygen, glucose, and other organic compounds. Respiration is the amount/rate of carbon dioxide consumed by an organism or plant. In the first part of the lab, we gathered four leaves and measured their respective radius to determine their area. We then placed those leaves in a plastic chamber that we covered with aluminum foil and had inserted CO 2 and O 2 gas sensors to measure the amount and change in gas over time. We collected data for 8 minutes after allowing the conditions to stabilize for 2 minutes. For the second part of the lab, we repeated the process of measuring the radius and area of four new leaves. However, this time we exposed the leaves to light within the same chamber and collected data for 8 minutes after allowing the conditions to stabilize for 2 minutes. We had hypothesized that the CO 2 graph would go up when the leaves were wrapped in aluminum foil and this proved to be correct for the most part.
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