1. Energy Flow in Ecosystems
Organisms interact with the ecosystem by:
Obtaining food from the ecosystem
Contributing energy to the ecosystem

2. CO2 + H2O + sunlight  C6H12O6 + O2
Photosynthesis
CO2 + H2O + sunlight  C6H12O6 + O2
Carbon dioxide and water react with sunlight to produce glucose and oxygen
used to capture & store energy
occurs in the chloroplasts
only plants, some protists,
& some bacteria do this.

3. Cellular respiration C6H12O6 + O2  CO2 + H2O + energy
Glucose and oxygen react to form carbon dioxide, water and release energy
used to release energy for use
occurs in the mitochondria
All living things need to do this

4. PHOTOSYNTHESIS CELLULAR RESPIRATION
Definition:
Process by which autotrophs capture energy & store it as carbohydrates
Process by which autotrophs & heterotrophs obtain energy through the breakdown of stored or ingested carbohydrates
Chemical equation:
6H2O + 6CO2 + ENERGY
 C6H12O6 + 6O2
C6H12O6 + 6O2
Requires:
(Reactants)
Carbon dioxide, water, & energy
Glucose & oxygen
Produces:
(Products)
Takes place in:
Plant, some protists, & some bacterial cells
All aerobic organisms
Organelle:
Chloroplast (contains chlorophyll to absorb sun’s energy)
Mitochondria