Photosynthesis Lab
Hypothesis-
The leaves will change color accordingly to their change in state. We think Black paper will cause less photosynthesis, uncovered will create the most, and cellophane will produce a decent amount. I think the uncovered leaves will have more starch then the covered leaves.
Purpose-
To learn whether the change light wavelength and intensity will affect the photosynthesis rate of a plant.
Materials-
1. Black paper
2. Blue cellophane
3. Green plant
4. Scissors
5. Petri dishes
6. Tape
7. Test tube
8. Lugol's iodine
9. Tweezers
10. Black pen
11. Mixing stick
12. Red plant
13. Dropper
Procedure-
Day 1:
Cover 2 or more leaves each with black paper and blue cellophane
Day 2:
Remove black paper and blue cellophane and cut off leaves of each applied including one without cover. Remove the chlorophyll by heating the leaves in ethanol. Then rinse the leaves. Test for starch by placing leaves in petri dishes and put iodine and look for positive indicators (color changes). Test the red plant aside the green plant.
Results-
The leaves will change color accordingly to their change in state. We think Black paper will cause less photosynthesis, uncovered will create the most, and cellophane will produce a decent amount. I think the uncovered leaves will have more starch then the covered leaves.
Purpose-
To learn whether the change light wavelength and intensity will affect the photosynthesis rate of a plant.
Materials-
1. Black paper
2. Blue cellophane
3. Green plant
4. Scissors
5. Petri dishes
6. Tape
7. Test tube
8. Lugol's iodine
9. Tweezers
10. Black pen
11. Mixing stick
12. Red plant
13. Dropper
Procedure-
Day 1:
Cover 2 or more leaves each with black paper and blue cellophane
Day 2:
Remove black paper and blue cellophane and cut off leaves of each applied including one without cover. Remove the chlorophyll by heating the leaves in ethanol. Then rinse the leaves. Test for starch by placing leaves in petri dishes and put iodine and look for positive indicators (color changes). Test the red plant aside the green plant.
Results-
Other results included:
The uncovered leaves had the most photosynthesis bubbles
The black Paper leaves had the least photosynthesis bubbles
The cellophane leaves has the second most photosynthesis bubbles
Analysis/Conclusion-
My hypothesis was correct in my photosynthesis statement on how much would be occurring later hand. The wave intensity effects photosynthesis more than the wave length. The black paper and cellophane covered leaves proved to be the two of the three that showed somewhat of a very weak positive on the starch indicator test. Although my hypothesis statement was wrong about the starch indicator statement. I thought that starch would be present in the uncovered leaves and lower in the covered leaves, yet it proved the opposite except it was really weak of a positive if it even was.
Reflection-
I thought this lab was interesting because it showed how important it is for planting a plant in a sunny/semi-sunny area and how it affects its photosynthesis. My partner and I collaborated well, but fell behind in the end because we got off track for a little and ended up finishing it over the beginning of the next period. We could've managed our time a little better but we got good results so it turned out fine. Two things I learned was that the change of the intensity of light decreased photosynthesis more than the wavelength of light and that starch becomes present in the leaves with less photosynthesis. Looking back, this experiment really showed me something I couldn't of just learned by reading a textbook.
The uncovered leaves had the most photosynthesis bubbles
The black Paper leaves had the least photosynthesis bubbles
The cellophane leaves has the second most photosynthesis bubbles
Analysis/Conclusion-
My hypothesis was correct in my photosynthesis statement on how much would be occurring later hand. The wave intensity effects photosynthesis more than the wave length. The black paper and cellophane covered leaves proved to be the two of the three that showed somewhat of a very weak positive on the starch indicator test. Although my hypothesis statement was wrong about the starch indicator statement. I thought that starch would be present in the uncovered leaves and lower in the covered leaves, yet it proved the opposite except it was really weak of a positive if it even was.
Reflection-
I thought this lab was interesting because it showed how important it is for planting a plant in a sunny/semi-sunny area and how it affects its photosynthesis. My partner and I collaborated well, but fell behind in the end because we got off track for a little and ended up finishing it over the beginning of the next period. We could've managed our time a little better but we got good results so it turned out fine. Two things I learned was that the change of the intensity of light decreased photosynthesis more than the wavelength of light and that starch becomes present in the leaves with less photosynthesis. Looking back, this experiment really showed me something I couldn't of just learned by reading a textbook.