1. Photosynthesis Rate Results
Ms. Albu
B Block

2. Photosynthesis Lab Findings
We tested the photosynthetic rate of leaf discs of spinach (control) to arugula (experimental) under a 100 watt lamp
Spinach had a higher rate of photosynthesis
We observed spinach to be more green in color than the arugula
Our graph:
Shannon Molloy, Olivia

3. Green Mustard Discs Floated
Time
(Seconds)
Spinach Discs Floated
(Control)
Green Mustard Discs Floated
(Experimental)
Manoj Malipeddu, Nam Le, Thien Vu
Average Rate (Green Mustard Leaves) = 10 discs / 70 seconds = .14 discs / second
Average Rate (Spinach Leaves) = 10 discs / 313 seconds = .032 discs / second 60 1 6 70 - 10
120 5
180
240 7
300 9
313
Nam,Manoj, Thien

4. Alex Cardeiro, Jonathan Townsend, Ryan Ditcham
Alex, Ryan, Jon
Alex Cardeiro, Jonathan Townsend, Ryan Ditcham

5. Rate of Photosynthesis over Time for Spinach Leaves and Crabapple Leaves by Shyam, Karthik, and Michael
Spinach Leaves photosynthesized at a faster rate than that of the Sweet Crabapple Leaves (0.9 leaves/min vs. 0.8 leaves/min)
Since the Spinach leaves were darker than the Sweet Crabapple leaves, it photosynthesized faster; the darker leaves allowed it to absorb the light more efficiently
Shyam, Karthik, Michael

6. Rate of Photosynthesis in Mint and Spinach Leaves
Photosynthetic rates:
Spinach: 16/228 seconds = floats/sec
Mint: 16/320 seconds= 0.05 floats/sec
Shannon Forty, Aine Holland, Jillian Nelson, and Nancy Wang
possible sources of error:
4 mint leaves already at surface before start of experiment
only did one trial
Our hypothesis was incorrect, because the spinach leaves had a higher rate of photosynthesis. While all 16 spinach leaf chads photosynthesized in 3 minutes 48 seconds (or 228 seconds), it took about 5 minutes and 20 seconds (or 320 seconds) for 16 mint leaf chads to photosynthesize. According to our research, darker green leaves appear darker because they absorb more light. By absorbing more light, the leaf would be able to photosynthesize at a higher rate than a leaf with less light absorption. Thus, the darker spinach leaves photosynthesized at a higher rate than the lighter mint leaves because of the difference in leaf color.
Shannon, Aine, Jill, Nancy
Hypothesis: If rate of photosynthesis in mint and spinach leaves was tested, then both plants would have relatively similar respiration rates because their growing conditions are similar.

7. Rate of Photosynthesis in Spinach and Kale
Felicia, Annie, Jenn

8. Summary
The rate of photosynthesis in kale was faster than that of spinach. Kale has a relatively thicker leaf which means that it has more intercellular space that can be filled with more mesophyll cells and more layers of photosynthetic cells. This allows for more air exchange and subsequently photosynthesis occurs more frequently during a certain period of time, making for an overall faster rate of photosynthesis.