1. Do Now 1. Organisms from a particular ecosystem are shown below. Which organism(s) is (are) heterotrophic? _______________________________________. Which organism(s) help(s) recycle materials? _____________________________________. Which organism(s) obtain(s) all of the nutrients from an abiotic source? ________________. Which organism(s) must obtain its energy from organism 1? _________________________. snake, fungus, grasshopper, mouse fungus grass fungus Objective: Learn about Food Relationships in an Ecosystem Key Words: Food chain, Food Web

2. 1. Among the organisms shown, which are autotrophs and which are heterotrophs? 2. Among the heterotrophs, which are herbivores and which are carnivores? 3. What kind of heterotrophs might enter this food chain when the mouse dies? Heterotrophs: snake, fungus, grasshopper, mouse Herbivores: grasshopper, mouse Fungus, bacteria Objective: Learn about Food Relationships in an Ecosystem Key Words: Food chain, Food Web Autotrophs: grass Carnivores: mouse, snake

3. 5. Arrange the pictures in a sequence showing who eats whom Who eats whom; Draw arrows to show who eats whom Objective: Learn about Food Relationships in an Ecosystem Key Words: Food chain, Food Web Grass grasshoppermousesnakefungus

4. 6. In summary, what is a Food Chain? It’s a sequence of organisms showing who eats whom. A diagram that represents the relationships between prey and predator. It’s the path in an ecosystem through which food passes Objective: Learn about Food Relationships in an Ecosystem Key Words: Food chain, Food Web

5. Objective: Learn about Food Relationships in an Ecosystem Key Words: Food chain, Food Web Using your card, made the longest food chain you can. Then, made the shortest food chain you can. Food Chain Project 1. Cut out some pictures and arrange them in two food chains: The longest food chain you can. (10 credits) The shortest food chain you can. (10 credits)

6. Objective: Learn about Food Relationships in an Ecosystem Key Words: Food chain, Food Web 2. Draw arrows to show how nutrients move on in your food chain. (10 credits) Food Chain Project

7. Producer Autotrophs Primary Consumer Herbivore Heterotrophs Secondary Consumer Carnivore Heterotrophs High Level Consumers Carnivore Heterotrophs Decomposer Heterotrophs Objective: Learn about Food Relationships in an Ecosystem Key Words: Food chain, Food Web 3. Label the role of all organisms in the food chains as: producers, primary consumers, secondary consumers, high level consumers, autotrophs, heterotrophs, herbivores, carnivores, or decomposers. (30 credits/each) 4. The project is neat and well presented. (10 credits) Food Chain Project

8. ? Autotrophs ? Herbivore Heterotrophs Secondary Consumer ? Heterotrophs High Level Consumers Carnivore ? Heterotrophs Objective: Learn about Food Relationships in an Ecosystem Key Words: Food chain, Food Web List 2 things you learned about Food Chains yesterday Label the roles of the organisms in the food chain below Do Now

9. Objective: Learn about Food Relationships in an Ecosystem Key Words: Food chain, Food Web Questions: 1.Are primary consumers, secondary consumers and high-level consumers always part of food chains? Explain. 2.Could a food chain begin with heterotrophs? Explain. 3.How do all food chains end? 4.Describe the patterns you observe in your food chain 5.In summary, what a food chain is? No, the smallest food chain contains only producers and decomposers No, because heterotrophs eat other living things, they do not make their own food Decomposers: bacteria and fungi It’s a sequence of organisms showing who eats whom. Food chains always starts with producers and ends with decomposers

10. 6. In summary, what is a Food Chain? It’s a sequence of organisms showing who eats whom. A diagram that represents the relationships between prey and predator. It’s the path in an ecosystem through which food passes Objective: Learn about Food Relationships in an Ecosystem Key Words: Food chain, Food Web

11. Multiple Choice Questions 1. One arctic food chain consists of polar bears, fish, seaweed, and seals. Which sequence demonstrates the correct flow of these organisms? A)polar bears‚ fish‚ seals‚ seaweed B)fish‚ seaweed‚ polar bears‚ seals C)seals‚ seaweed‚ fish‚ polar bears D)seaweed‚ fish‚ seals‚ polar bears 2. Which sequence shows a correct pathway in a food chain? A)bacteria‚ grass‚ fox‚ owl B)algae‚ snake‚ duck‚ deer C)grass‚ grasshopper‚ frog‚ snake D)fungi‚ beetle‚ algae, mouse 3. The diagram below shows a food chain. If the population of bobcats decreases, what will most likely be the long-term effect on the rabbit population? A)It will increase and then decrease B)It will decrease and then increase C) It will increase, only D) It will decrease, only Objective: Learn about Food Relationships in an Ecosystem Key Words: Food chain, Food Web

12. Objective: Learn about Food Relationships in an Ecosystem Key Words: Food chain, Food Web Polar BearFishSealSeaweed OwlBacteriaBeetleDeer Fungi FoxAlgaeBobcat

13. Producer Autotrophs Primary Consumer Herbivore Heterotrophs Secondary Consumer Carnivore Heterotrophs High Level Consumers Carnivore Heterotrophs Decomposer Objective: Learn about Food Relationships in an Ecosystem Key Words: Food chain, Food Web GALLERY WALK Compare and contrast different food chains during your gallery walk and answer the following questions: (25 credits) 1. How are all food chains alike? 2. How are all food chains different? 3. Could a food chain begin with heterotrophs? 4. How do all food chains end? 5. Describe the patterns you observe in your food chain 6. Explain what a food chain is.