1. EMILY BURY WILL BOHLS MADDIE RITCHIE MATHEW MILLER
GRASS FED
EMILY BURY
WILL BOHLS
MADDIE RITCHIE MATHEW MILLER

2. Photosynthesis

3. WHAT ARE WE TESTING? Hypothesis
How the surface area of a leaf affects photosynthesis
We believe that the leaf with the larger surface area will have the higher rate of photosynthesis because more sunlight can be collected.
Hypothesis

4. Controlled Variables and Constants
Light
Age (just a constant)
Surface area of leaves
Dependant Variable

5. Independent Variables
Rate of photosynthesis that occurs
The time used
Seconds and minutes that the light is on
Parts per million that measure

6. Materials 6 leaves from a pachina(money tree) plant C02 sensor
Jar or chamber
Lamp with a 60 watt incandescent bulb
Laptop
Logger Pro software
Stop watch
Connecter cords
Ruler

7. Set Up

8. Measurement of the Surface Area of the Leaves
Leaf 1: 1.5 inches squared
Leaf 2: 2 inches squared
Leaf 3: 2.34 inches squared
Leaf 4: 5.25 inches squared
Leaf 5: 5.25 inches squared
Leaf 6: 6 inches squared

9. Procedure Measured each surface are of each leaf
Tested the CO2 concentration of each leaf
Entered the data into Logger Pro
Constructed a line graph to compare the concentrations

11. Conclusion
Bigger the leaf slower the rate of photosynthesis

12. Bibliography
A. Patakas, B. Noitsakis, K. Chartzoulakis. “CHANGES IN W.U.E. IN VITIS VINIFERA AS AFFECTED BY LEAF AGE.” International Society for Horticultural Science. 7 Mar < 49_63>.
“Leaf .” Science Resource Center. Gale. St. Andrew’s Upper School Library, Austin, TX. 6 Mar <
“PHOTOTSYNTHESIS .” PHOTOSYNTHESIS . 6 Mar < BookPS.html>.
“Plants .” Science Resource Center. Gale. St. Andrew’s Upper School Library, Austin, TX. 6 Mar <