Photosynthesis Lab
ResultsConclusionIn this Lab I worked with Peter, Austin, Jason, Toran, Kyle, and Logan. We all worked very well together and we were able to keep on track and do it very quickly. If I could do something different in this lab I would of not used as much iodine. In this lab I found it interesting that the red paper was more effective for the plant.
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1. Cover 3 leaves in: cellophane, black paper, and none (control)
2. Wait 48 hours 3. Cut off experimental and control leaves, remove the papers 4. Roll up leaves and put into test tube; label 5. Extract chlorophyll with hot alcohol 6. Rinse in water 7. Place in petri dish 8. Cover with iodine 9. Wait 1 minute, then remove leaf and place on paper towel 10. Observe and record observations in a data table, giving numerical value for color change Materials- Green plant leaves, Red plant leaves, Black construction paper, Red cellophane, Scissors, Iodine, Test tubes, Alcohol, Petri dishes, Pipets, Tape, Paper towels, Tweezers, Fume chamber, Hot plate
Hypothesis-As a group we hypothesized that the normal leaves will make the most starch, then the cellophane covered ones, and then the black ones will make the least. I also predict that the plants with the higher exposure to natural light will make more chlorophyll.
Data Analysis-It turned out that the leaves with red cellophane made the most amount of starch. Then as you can probably tell the uncovered ones had the next highest and then the black ones had the least.
Then in the chlorophyll part it was the same thing which also greatly surprised us. |