1. 9/18/14
Objective: How do living things get their energy?
Do Now:
Recall the levels of organization, what is an ecosystem?

2. Ecology Biotic factors: all of the living things
ecology: the interactions between organisms and their environment
Biotic factors: all of the living things
Abiotic factors: non-living conditions

3. Types of organisms Producers (autotrophs): make their own food
Energy from the sun
Consumers (heterotrophs): eat other organisms for energy
Herbivores: eat plants
Carnivores: eat animals
Omnivores: eats both plants and animals
Decomposers: break down remains of plants and animals

4. Food Chains Draw the Arrows: This is a food chain Grass Insect Bird
Fox
Where does the initial energy come from?
How does each organism obtain their energy?
A food chain is a sequence in which energy is transferred from one organism to the next as each organism eats another organism

5. - The arrows show the FLOW OF ENERGY
Food Webs
Food webs are interconnected food chains that show many feeding relationships
hawk
Bird snake
mouse insect
seeds grass
- The arrows show the FLOW OF ENERGY

6. Food Webs Energy flows in one direction. Which direction?
Energy flows from producers to herbivores to carnivores to decomposers

7. Factors that affect stability
- Food webs more stable than food chains
- Removing or adding organisms can be harmful to the stability