1. Photosynthesis and Cellular Respiration Notes
DEF- Photosynthesis: process by which plants, algae, and some bacteria use sunlight, carbon dioxide and water to make their own food.

2. Capturing Light Energy
Pigments are molecules that absorb light energy.
DEF - Chloroplast: organelle in the plant cell that makes food during photosynthesis
DEF - Chlorophyll: a green pigment (found in the chloroplasts) that absorbs light energy for photosynthesis.
 Chlorophyll absorbs most wavelengths of light.
 It reflects the green wavelength so the plant looks green.

3. (C6H1206) Making Sugar Light energy is captured by chlorophyll
and used to change CO2 and
H2O into a sugar called glucose.
Glucose = Simple sugar
Glucose contains stored chemical energy
Equation for photosynthesis:  
6CO2 + 6H2O > C6H12O6 +6O2
(C6H1206)
light energy
Reactants = Carbon Dioxide
 Water
Products = Glucose
Oxygen

4. C6H12O6 + 6O2 ------>6CO2 + 6H2O + energy
Cellular Respiration
DEF - Cellular Respiration : the process by which cells use oxygen to
produce energy from food.
 In the plant cell and animal cell
oxygen is used to break down glucose molecules to make energy.
Energy is used to make ATP (adenosine triphosphate)
Cellular Respiration takes place in the mitochondria
Equation for Cellular Respiration:
C6H12O6 + 6O >6CO2 + 6H2O + energy
reactants
products

5. Stoma: opening in a leaf or stem that allows the exchange of gas to occur.
Plants must bring in CO2 for photosynthesis
and release O2 produced during photosynthesis

7. CO2 O2 CO2 H2O C6H12O6 Cellular Respiration C6H12O6 O2 H2O
Photosynthesis
H2O
CO2
energy O2
C6H12O6
_____ + _____ > _____ + _____
Cellular Respiration
C6H12O6 O2
H2O
CO2
energy
_____ + _____ > ____ + ____ +_______

11. CO2 H2O C6H12O6 H2O H2O O2 CO2 C6H12O6 C6H12O6 CO2 O2 O2 + + + +
Photosynthesis
Cellular Respiration
H2O
DEF-Process by which a cell captures
the energy in sunlight & uses it to 
make food.
DEF-Cells break down simple food
molecules and releases the energy
they contain.
1. Captures sun's energy
1. Glucose broken down into 
CO2 and H2O and energy is released.
Energy
2. Produces sugar (glucose)
Chlorophyll - Green
pigment found in
chloroplasts + O2
CO2
CO2 +
C6H12O6
C6H12O6
CO2 +
Energy
H2O
C6H12O6 + O2
Energy O2
H2O