The document discusses an experiment on photosynthesis. Students observed the rate of oxygen bubble production during photosynthesis under different conditions. They varied the light bulb size, distance between the bulb and plant, and measured oxygen bubbles produced per time and per minute. Photosystem 2 uses carbon dioxide and water to begin energy production, driven by sunlight and chlorophyll. The class will continue the lab next week to examine the second step of photosynthesis.

2. http://www.nuffieldfoundation.org/pract
ical-biology/energy

3. http://www.nuffieldfoundation.org/pract
ical-biology/energy

5. Sugar and oxygen

7. The class will be looking at an
example of photosystem 2 where
the first part of the reaction leaves
oxygen as its by product.

8. To study the rate of
Photosynthesis the

11. Experime Size of Distance Oxygen Oxygen c
nt bulb Bubbles Bubbles o
per time Per l
minute o
r
1 100w 10cm 39 3.9 c
100w 20cm 24 2.4 c
c
2 100w 10cm 20 5 c
40w 10cm 6 1.5 c
3 100w 20cm 80 20 c
40w 10cm 46 11.5 c
4 100w 10cm 41 10.25 r
100w 10cm 21 5.25 g
5 100w 20cm 5 1.25 r
100w 20cm 0 0 g

12. Photosystem 2 uses carbon dioxide and water
from the environment to begin the process of
making energy. This is driven by the presence
of sunlight and chlorophyll. A continuation of
this lab is set for next week when we will look
closer at the steps involved in the second step
in photosynthesis.