Producers get their energy from the sun.

Producers convert this light energy into stored chemical energy (glucose).

This process is called photosynthesis.

Photosynthesis

Light energy

Stored energyGlucose

Consumers get their energy from the producers.

Consumers convert stored chemical energy (glucose) into usable chemical energy (ATP).

This process is called cellular respiration.

Cellular Respiration

Stored energy

Usable energy

ATP

Photosynthesis

Water

Carbon

Dioxide

Sunlight

Sugar

Oxygen

H2O

CO2

O2

C6H12O

6

Photosynthesis

6 H2O + 6 CO2 + energy (sun) → C6H12O6 + 6 O2

SunlightH2O CO2

O2

C6H12O

6

PHOTOSYNTHESIS

LIGHT PHASE DARK PHASE

THYLAKOID STROMA

LIGHT PHASE

THYLAKOID

DARK PHASE

STROMA

LIGHT PHASE

DARK PHASE

THYLAKOID

STROMA

Chlorophyll photoactivation Sunlight excites the electrons

Photolysis Oxygen is released

H2OO2

H2 + NADP -> NADPH

Photophosphorylation ADP + P = ATP