Photosynthesis Lab Data Collection (Day 3)

Leaf Disk Assay : Photosynthesis Lab Data Collection (Day 3)

Learning Objective: I can measure the rate of photosynthesis in a leaf by observing the buildup of oxygen which makes leaves float. I will adjust variables to see its effect on photosynthesis. 

Today you will be doing the actual data collection for the lab.

1. Review procedure and set up materials.

2. Time rate of photosynthesis under different variables and record data

3. Analyze data and work on lab writeup 

IMPORTANT TIPS:
-Add 1 drop of soap to the baking soda solution to wet the hydrophobic surface of the leaf and allow the solution to be drawn into the leaf.
-Use 1 scoop of baking soda per 100mL of water.
-1 scoop of baking soda = 1.5 grams
-Try holding the vacuum for 10 seconds to sink the disks in the syringe
-Every cup has to get the same amount of light per group unless you're testing light type or intensity.

You will have Friday to work on the data analysis: graph and conclusion questions. It will be due by the end of the class period on Friday for 30 points.