Presentation on theme: "9/18/14 Objective: How do living things get their energy? Do Now:"— Presentation transcript:
1 9/18/14Objective: 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 environmentBiotic factors: all of the living thingsAbiotic factors: non-living conditions
3 Types of organisms Producers (autotrophs): make their own food Energy from the sunConsumers (heterotrophs): eat other organisms for energyHerbivores: eat plantsCarnivores: eat animalsOmnivores: eats both plants and animalsDecomposers: break down remains of plants and animals
4 Food Chains Draw the Arrows: This is a food chain Grass Insect Bird FoxWhere 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 WebsFood webs are interconnected food chains that show many feeding relationshipshawkBird snakemouse insectseeds 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