1. Do Now: 1. Take the two sheets from the front of the room Homework: 1.Energy Flow Reading and Review Sheet 2.Test on Thursday

2. Energy Flow in Ecosystems Energy Roles: each of the organisms in an ecosystem fills the energy role of producer, consumer or decomposer 1. Producer: an organism that can make its own food Source of all food in an ecosystem Energy enters most ecosystems from the sunlight (through to process of photosynthesis)

3. 2. Consumer: an organism that obtains energy by feeding on other organisms Classified based on what they eat -herbivores: eat only plants ex. Caterpillar, deer -carnivores: eat only animals ex. Lions, spiders -some carnivores are scavengers (feeds on the bodies of dead organisms) ex. Catfish and vultures -omnivores: eat both plants and animals ex. Crows, bears, humans

4. 3. Decomposers: break down wastes and dead organisms and return the raw material to the ecosystem -nature’s recyclers Ex. Mushrooms and bacteria

5. Food Chains and Food Webs: show the movement of energy through an ecosystem 1. Food Chains: series of events in which one organism eats another and obtains energy One possible path that energy can move through 2. Food Webs: many overlapping food chains in an ecosystem More realistic way to show the flow of energy through an ecosystem

6. Energy Pyramids: shows the amount of energy that moves from one feeding level to another in a food web The most energy is available at the producer level Each level has less energy available than the level below

8. Brainpop –Food ChainFood Chain –MetamorphosisMetamorphosis –Natural SelectionNatural Selection –EvolutionEvolution