Photosynthesis Lab
Hypothesis: The black paper will make the photosynthesis stop and the see through the paper will not stop the photosynthesis. Black paper increases the intensity , clear paper increases the intensity because it absorbs more light than usual. Black paper decreases its intensity because it blocks all lights so photosynthesis cant occur.
Materials:
- calendula (plant)
- black paper
- test tubes
- pipettes
- cellophane
- Lugol's iodine
- petri dish
- scissors
- tape
Procedure:
1. Cover 3 leaves in cellophane, black paper, and clear papaer
2. Wait 48 hours
3. Cut off experimental and control leaves, remove the papers
4. Roll up leaves and put into test tube and 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:
- calendula (plant)
- black paper
- test tubes
- pipettes
- cellophane
- Lugol's iodine
- petri dish
- scissors
- tape
Procedure:
1. Cover 3 leaves in cellophane, black paper, and clear papaer
2. Wait 48 hours
3. Cut off experimental and control leaves, remove the papers
4. Roll up leaves and put into test tube and 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
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Conclusion: Our results did not match our hypothesis or the expected outcome. Theoretically, our results should have confirmed our hypothesis as correct, but all of our tests were the exact opposite of the desired results. In the end of our lab, we were a little disappointed that our hypothesis was so far off of the results we gathered from the lab we did.
Reflection: In this lab, I feel our group collaborated very well and did our best to get the most logical and realistic results we could from this lab. We really worked hard and put our main focus on finishing the lab. I feel that I learned more about photosynthesis then I ever had and now I'm a little smarter in not only photosynthesis science, but in science as a subject.
Reflection: In this lab, I feel our group collaborated very well and did our best to get the most logical and realistic results we could from this lab. We really worked hard and put our main focus on finishing the lab. I feel that I learned more about photosynthesis then I ever had and now I'm a little smarter in not only photosynthesis science, but in science as a subject.