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Warm-up. Draw a food chain using these organisms: . Big Leaf Maple. Millipede. Salamander. Sharp Shinned Hawk. Garter Snake. Food Chain. Sharp Shinned Hawk. Big Leaf Maple. Millipede. Salamander. Garter Snake. Today’s objective:

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  1. Warm-up Draw a food chain using these organisms: Big Leaf Maple Millipede Salamander Sharp Shinned Hawk Garter Snake

  2. Food Chain Sharp Shinned Hawk Big Leaf Maple Millipede Salamander Garter Snake Today’s objective: Using a food web to illustrate and analyze how energy flows through an ecosystem.

  3. It’s all about ENERGY! Arrows show direction of ENERGY flow: NOT direction of eating: Grass Cow Cow Grass

  4. Food Web • Insert the following organisms into your diagram to convert your food chain into a food web: Shrew Club Moss Banana Slug Bullfrog

  5. Food Web Shrew Food WEB Sharp Shinned Hawk Big Leaf Maple Garter Snake Millipede Salamander Food CHAIN Banana Slug Club Moss Bullfrog

  6. Check in • How does a food web differ from a food chain? • Is a food web a network? Explain your answer.

  7. Producers • Place a star next to all the organisms that are producers in your food web.

  8. Classifying organisms by energy intake Producer- Gets energy from the sun. Consumer- Gets energy from eating other organisms. Herbivore- eats plants Carnivore- eats animals Omnivore- eats plants and animals

  9. Primary, Secondary, Tertiary & Quaternary Consumers • Place a “1°” next to any consumer that can act as a primary consumer… • A “2°” next to any consumer that can act as a secondary consumer… • A “3°” for tertiary consumers… • And a “4°” for quaternary consumers.

  10. Trophic levels Trophic level- An organism’s position in food chain. All organisms in the same position in a food chain are in the same trophic level. Maple Millipede Salamander Snake Hawk (1°) Primary Consumer (2°) Secondary Consumer (3°) Tertiary Consumer (4°) Quaternary Consumer Producer

  11. Check-in • In a food web, what is the difference between a consumer and a producer? • If all the shrews in our food web died, could this cause a change in the hawk population? Explain.

  12. Abiotic Factor • Add the following abiotic node to your network: • Sunlight • NOTE: Use a different shape to show that this node is different from the previous biotic nodes. • Draw a key for your network to identify both types of nodes and your edges.

  13. Biotic & Abiotic Factors Biotic Factors – The living components of an ecosystem. • Plants, animals, bacteria, etc. Abiotic factors– the non-living components of an ecosystem • Sunlight, Water, Temperature, Minerals, Salinity (salt content), Space, Rocks/soil

  14. ECOSYSTEMS Ecosystems include both living (biotic) and non-living (abiotic) components

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