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Energy Transfer Through an Ecosystem BELL RINGER In your journals… List some of your favorite foods. Can you trace your food back to it’s source of energy? Objectives Students will describe vocabulary words (Autotrophic, Heterotrophic, Producer, Primary Consumer, Secondary Consumer, Decomposer). Students will apply vocabulary words to a food chain or food web. Students will formulate how much energy is transferred (and how much energy is lost) with each stage of a food chain/web. Students will create a food chain/web which synthesizes their knowledge of energy transfer through a food chain, energy lost and vocabulary words. Vocabulary Words Autotrophic Heterotrophic Producer Primary Consumer Secondary Consumer Decomposer Trophic Pertaining to nutrition. The feeding habits or food relationship of different organisms in a food chain. 2 Types: ways organisms get energy Autotrophic Heterotrophic Autotrophic Organisms Self-sustaining or self-nourishing organisms e.g. green plants, algae, and certain bacteria A.K.A. Producers Heterotrophic Organisms Unable to self-nourish. Feeds on organic matter produced by, or available in, other organisms. E.g. birds, cats, fish, mushrooms, some bacteria. A.K.A. Consumers and Decomposers Producer An autotrophic organism capable of producing its own food through the process of photosynthesis (using light energy) e.g. green plants, algae, and certain bacteria Consumer An organism that obtains food by feeding on other organisms or organic matter due to lack of the ability to manufacture own food. a heterotroph. E.g. birds, fish,dog, human Primary Consumer Any organism that consumes or feeds on autotrophs or decaying matter. E.g. cows Secondary Consumer An organism that largely feeds on primary consumers. E.g. wolf Decomposer an organism that eats dead or decaying organisms E.g. fungus such as mold or mushroom, some bacteria Beach Ball Game 1. 2. 3. 4. 5. 6. Autotrophic Heterotrophic Producer Primary Consumer Secondary Consumer Decomposer Energy is lost between stages Energy is lost as heat. Energy is lost as waste. Energy is used during respiration. Animals don’t usually eat all of the food available in the organism they feed on. Group Activity Make a food web using at least one ingredient from your group’s food box. Label/include all vocabulary words: Autotrophic, heterotrophic, producer, primary consumer, secondary consumer, decomposer. Include how many units each organism would have if 10,000 units of energy fall onto the producer. (producer incorporates 1% of energy that falls onto it. Only 10% of energy passes from one stage to the next)