1. LIVING ORGANISMS AND THEIR ENVIRONMENT

2. INTERDEPENDENCE
All organisms in an environment or ecosystem play an important role in that environment or ecosystem
Organisms in an environment are interconnected and depend on each other in one way or another

3. PRODUCERS
Producers are organisms in a food web that produce food for the other organisms
Producers are the basis of a food web. ALL organisms rely on producers
Producers make their own food by photosynthesis
Producers rely on carbon dioxide emitted by consumers for them to perform photosynthesis
Example: Plants

4. CONSUMERS
Consumers are organisms in an ecosystem that must eat food to obtain energy
Consumers might eat producers or they might eat other consumers
Consumers rely on plants for food and for oxygen
Example: A deer would eat plants to survive or a wolf would eat a deer to survive. Deer and wolves are consumers

5. DECOMPOSERS
Decomposers are organisms that break down waste and recycle it back into the soil
Decomposers may break down animal waste, dead leaves or dead animals
Decomposers improve the health of the soil by adding nutrients to it which other organisms can use
Example: mushrooms, bacteria