Name: _______________________________
Date: ___________
AP Biology Lab 6: Photosynthesis
Report
WHAT
Topics: photosynthesis
Vocabulary: ATP, Calvin cycle, chemiosmosis & electron transport chain, chloroplast, glucose,
light dependent reactions, light independent reactions, NADPH, stroma, thylakoids
Expected results: The only preparation that we would expect to show increased %
transmittance over time would be #2 -- “unboiled light”.
Actual results:
Group 1
Percent Transmittance
elapsed time
1 -- unboiled dark
2 -- unboiled light
3 -- boiled light
4 -- no chloroplasts
0
31.7
34.1
33.1
31.5
5
34.2
56.6
32.9
31.5
10
35.0
64.1
33.1
31.6
15
35.2
72.1
32.8
31.5
Group 2
Percent Transmittance
elapsed time
1 -- unboiled dark
2 -- unboiled light
3 -- boiled light
4 -- no chloroplasts
0
31.6
31.5
33.2
31.5
5
31.6
31.5
33.1
31.5
10
31.6
31.6
32.9
31.5
15
31.6
31.6
32.8
31.5
Group 3
Percent Transmittance
elapsed time
1 -- unboiled dark
2 -- unboiled light
3 -- boiled light
4 -- no chloroplasts
0
37.0
32.6
32.0
32.2
5
34.8
56.0
32.9
32.8
10
35.1
64.1
33.0
33.2
15
35.1
72.0
33.1
33.1
Name: _______________________________
Date: ___________
HOW
Ideal procedure: Set up a controlled experiment to test variables that affect photosynthesis.
• Keep most conditions constant (light source, temperature, container size/shape, fluid amounts)
• Vary some conditions -- the independent variables (dark, light, boiled, unboiled)
• Measure one variable over time -- the dependent variable (% transmittance of light)
Actual procedure: (same -- but depends on following the correct procedure)
WHY
Explanation of results:
Explanation of process:
CONCLUSIONS
Big ideas:
Connections: