Leaf Lab
By Mikaela Stokes & McKenzie Ivins
Problem:
Hypothesis:
The manipulated variable:
Control:
Description:
Two clamps (to hold it together)
Ring stand (to hold the photometer and pipet attached together in place)
Pipet (to attach to the photometer and leaf)
Syringe (to pour the water in the photometer/pipet)
Petroleum Jelly (to block the air way of the leaf)
Leaf (that has previously absorbed water)
Food Coloring (red)
Materials:
Two clamps
Ring stand
Pipet
Syringe
Petroleum Jelly
Leaf
Food Coloring
Procedure (manipulated):
2. Attach the pipet and photometer to each other.
3. Pour water into the pipet with the syringe (make sure there aren't any bubbles!).
4. Attach the syringe to the ring stand and hold it in place with the two clamps.
5. Graph the leaf and calculate the area of the leaf.
6. Cut the leaf stand at a 45 degree angle.
7. Put the leaf with the stem in the pipet and seal the remaining opening with the petroleum jelly.
8. Record the initial amount of water in the photometer.
9. Start the timer and record the amount of water in the photometer every 2 minutes for 16 minutes.
10. Conduct a phi test.
11. Analyze data and come to a conclusion.
Procedure (control):
1. Attach the pipet and photometer to each other.
2. Pour water into the pipet with the syringe (make sure there aren't any bubbles!).
3. Attach the syringe to the ring stand and hold it in place with the two clamps.
4. Graph the leaf and calculate the area of the leaf.
5. Cut the leaf stand at a 45 degree angle.
6. Put the leaf with the stem in the pipet and seal the remaining opening with the petroleum jelly.
7. Record the initial amount of water in the photometer.
8. Start the timer and record the amount of water in the photometer every 2 minutes for 16 minutes.
9. Conduct a phi test.
10. Analyze data and come to a conclusion.