2. Organization within the Environment and Food Webs
Notes and Practice Problems

3. Levels of Organization in the Environment
Atom
Molecule
Cell
Tissue
Organ
Organ System
Organism
Population
Community
Ecosystem
Biosphere
Smallest
Largest

4. Organization Vocabulary:
Organism: A single living thing (biotic factor).
Population: A group of organisms from the same species.
Community: All the living (biotic) factors interacting in an area.
Ecosystem: All of the living (biotic) and nonliving (abiotic) things that interact in an area.

6. Levels of Organization in the Environment

7. Types of Organisms: Producers: Consumers: Decomposers:
Make their own food
Autotrophs
Consumers:
Do not make their own food. Rely on another food source.
Heterotrophs
Decomposers:
Break down dead/used materials and convert them back into nutrients.

8. Producers
Consumers
Decomposers

9. Consumers: Herbivore: Omnivore: Carnivore: Scavenger: eats only plants
eats plants and meat
Carnivore:
eats only meat
Scavenger:
Type of carnivore
Eats only dead meat (killed by another organism)

10. Consumer Levels Primary Consumer Secondary Consumer Tertiary Consumer
Herbivores
Secondary Consumer
Omnivore or Carnivore
Eats something that ate something else
Tertiary Consumer
Carnivore
Eats something that ate something, that ate something else.

11. Consumer
Levels

12. Food Webs vs. Food Chain
Food Chain: follows a SINGLE path as animals eat each other.
One path of energy
vs.
Food Web: shows all the feeding interconnections between organisms (plants and animals)
Everything is connected

13. Food Web vs. Food Chain

14. Food Web