My Photolab Data and Conclusion

Question: How does the color of light affect photosynthesis in increased CO2?

Hypothesis: If color affects the photosynthesis process of plants, then photosynthesis will differ under different colored lights.

Controls: power (50), time (20 secs), temp (25), increased CO2

Independent Variable: color of light

Dependent variable: number of O2 bubbles

	TRIAL 1	TRIAL 2	TRIAL 3
Color of Light	# of O2 bubbles	# of O2 bubbles	# of O2 bubbles	AVERAGE
white	22	23	22	22.3
orange	18	17	18	17.6
green	7	7	7	7
blue	21	20	20	20.3

Conclusion

In this lab, I questioned whether the color of light would affect photosynthesis in a plant that is placed in increased carbon dioxide. I found that photosynthesis occurs best under white light, which had an average of 22.3 oxygen bubbles per 20 seconds, and barely occurs under green light, which had an average of 7 oxygen bubbles per 20 seconds. This data supports our claim because photosynthesis did differ under different colored lights.

This lab was done to demonstrate the effect of light on plants. From this lab, I have learned that white light helps photosynthesis best, which helps me understand how plants grow and what they use. Based on my experiences from this lab, I can now grow better plants and flowers and if I ever own a greenhouse, I can grow strong, large plants.

Egg Diffusion Lab

        We began the egg diffusion lab by placing two eggs in cups that were filled with white vinegar. After a couple days the egg shell had dissolved in the vinegar. We washed the eggs until the membrane was almost clear and then placed on in a cup filled with corn syrup, and the other in water. We let them sit for a couple of days. After this, we checked the eggs and the one in sugar water had shrunk by almost a half of its original size, and the one in water stayed the same. The egg in sugar water shrunk because the molecules inside it diffused from high concentration to low concentration. It used passive diffusion in the process. The molecules in the egg in water wanted to also leave the egg but they were too large to pass through the semi-permeable membrane, and so they were stuck. They gained water, and some gained so much that their membrane gave out and the egg exploded.

Class Data: Control (DI water)	table 8	table 2	table 3	table 4	table 5	table 6	table 7	average
% change in mass	N/A	N/A	-0.74%	0.37%	0.45%	N/A	6.95%	1.80%
% change in circumference	N/A	N/A	1.20%	1.70%	0%	N/A	14.37%	4.30%
Class Data: Sugar Water	table 8	table 2	table 3	table 4	table 5	table 6	table 7	average
% change in mass	-46.70%	-44.90%	-52%	-49.70%	-41.71%	-39.58%	-47.70%	-42.25%
%change in circumference	-22.40%	-18.78%	-26.30%	-26.60%	-32.35%	-21.21%	-13%	-22.94%