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

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)

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

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

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

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

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