Light as a Factor in Photosynthesis

1
Light as a Factor in Photosynthesis

• GERANIUM LEAF LAB

2
Sketch the Geranium leaf. Color matters!
3
Sketch the leaf with part being covered to
prevent exposure to light
4
Sketch the Geranium leaf after treatment (boiling)
in warm alcohol
5
Sketch the Geranium leaf after treatment with Lugo
ls
6

• Questions to consider
• What does Lugols Iodine test for?
• 2. What effect did the paper
• have on the leaf?
• 3. Why did this happen?
• 4. Write a brief conclusion
• for this lab.

7
Pigment as a Factor in Photsynthesis

• Coleus Leaf Lab

8
Sketch the Original variegated Coleus leaf
shown Color matters!
9
Sketch the Coleus leaf after treatment (boiled)
with alcohol
10
Sketch the Coleus leaf after treatment with
Lugols
11
QUESTIONS TO CONSIDER 1.What did the Lugols
indicate about the leaf? 2.Where is this
substance found in the leaf? 3.Write a brief
conclusion for this experiment.
12

Gas as afactor in Photsynthesis

• Elodea Lab

13
DAY 1 in Light
Sketch the bottle with Elodea and BTB, remember
color matters!
14
DAY 2 after 24 hours
Sketch the bottle with Elodea and BTB, remember
color matters!
15
Questions to consider 1.What does BTB test
for? 2.What changes did you observe in the
bottle? 3.Why did these changes occur? 4.What
does this indicate? 5.Write a brief conclusion
for this experiment.