7/17/2016
Photosynthesis:
General Equation for Photosynthesis
• Light energy + CO2 + H  makes sugars.
• Substrate/inputs/starting materials
• Obtained from environment
CO2 + H20
Provides
energy for
process
• Performed by all photosynthetic autotrophs (photoautotrophs)
– Cyanobacteria
– Algae (and other protists)
– plants
General Equation for Photosynthesis
•
•
+ O2
Pigment = molecule that has color
•
•
•
Photosynthetic pigment absorbs light
energy (capture light energy)
Absorbed light is captured
Non-absorbed light is reflected  creating
visible color of pigment
General Equation for Photosynthesis
+ O2
CO2 + H2O
----------- C6H12O6
+ O2
Stays in organism
Air
Water (that organisms
lives in)
•
•
Broken down for energy
Used as building material
Released to Env.
From Env:
•
•
Light & pigment
• Products/ending materials
----------- C6H12O6
From Env:
---------------- C6H12O6
CHLOROPHYLL:
IS MAIN PHOTOSYNTHETIC PIGMENT
• Substrate/inputs/starting materials
• Obtained from environment
CO2 + H20
• Products/ending materials
Soil
Water (that organisms
lives in)
• Oxygenates air
• Oxygenates water
White light is composed of many colors (wavelengths)
of light mixed together
ROY G. BIV
Color of pigment = color NOT absorbed
1
7/17/2016
Absorbed v. reflected
visible
A
Reflected light  color of
object (color object appears)
transmitted light  also visible
NOT
visible
B
absorbed light  energy
captured my object/material
The color you see is/are the reflected or transmitted colors (wavelenths)
The colors you do NOT see are absorbed
Measuring
Apparatus
After
5 min
Start
(T0)
Chromotography
Amount of
photosyn
Start
(T0)
Today
1. Photosynthesis Activity
a. Hypothsesize
b. Light intensity (all groups)
c. Wavelength (only at 15 cm), 1 color/group
paper
2. Spectrophotoscope activity
3. Chromotography
pigment
solvent
Worksheet Due Next Week
2
7/17/2016
Debrief
Chromotography
results
Pigment absorption
Pigments and Autotroph Diversity
3