1. D.N.A Objective: SWBAT analyze an ecosystem’s energy flow through food chains and food webs 1. What is the difference between a producer and a consumer? 2. Herbivores are what kind of consumers? 3. Carnivores have to be at least this level of consumers Producers are able to produce their own food and energy Consumers depend on others for food PRIMARY CONSUMERS SECONDARY CONSUMERS

2. What does the prefix “auto” mean? As in AUTOPILOT! SELF Nourishment (feeding) What are examples of organisms that make their own food (AUTOTROPHS)? Autotrophs are also known as Producers

3. How do autotrophs produce their own food? Energy from The SUN!

4. Deep sea bacteria live at ocean depths too great for light to reach, thus photosynthesis cannot occur. Yet, these bacteria still make their own food (sugars). What is this process called? What if there is no sunlight? Chemosynthesis

5. What does the prefix “Hetero” mean? Other Nourishment (feeding) What are examples of organisms that eat other organisms (HETEROTROPHS)? Heterotrophs are also known as Consumers

6. Basic Food Chain Arrows show the movement of energy In this example energy flows from the sun to the plants to the rabbit to the owl.

7. FOOD WEBS Multiple Food Chains connected together Shows how organisms relies upon others for survival and energy

8. Energy in Ecosystems Ecological Pyramids-a model which shows how energy flows through an ecosystem. Pyramid of Energy Heat 0.1% Consumers 1% Consumers 10% Consumers 100% Producers Parasites, scavengers, and decomposers feed at each level. Energy decreases at each trophic level. Only 10% of the energy is passed up each level! Energy decreases at each trophic level. Only 10% of the energy is passed up each level!

9. GUIDED PRACTICE Eagles Snakes Rabbits Grasses Field Mice Weasels

10. 1.Identify the… a. Producer(s) b. Primary Consumers(s) c. Secondary Consumers(s) Trees and Grass (Level A) Elk, Rabbit, Mouse, Frog, Cricket (Level B) Lion, Snake, Hawk (Level C)

11. If the field mice were eliminated due to farming, what organisms would be greatly affected? Why? The snake and hawk because they depend on the mouse for food Larger population of crickets

12. If the Elk were to go extinct, would the mountain lion be affected? How might the mountain lion deal with losing this source of energy? How might this affect the other organisms in the food web? Yes, because it needs the Elk for food The mountain lion will eat more of the rabbits The hawk is losing a source of food if the mountain lion eats more of the rabbits

13. Under the Sea! – Marine Food Web Activity 1.Get into a group of 4 2.Each team is given a game board, trophic level chart, organisms pictures, one pair of scissors, and a glue stick 3.You have 20 minutes to correctly place the organisms on the game board using the clues on the trophic level chart!

14. EXIT TICKET!

15. HOMEWORK – FOOD WEB POSTER! Due October 12 Must contain at least 8 organisms Found in the same ecosystem (pond, desert, rainforest, ocean) –Energy source (sun) –Producers, Primary Consumers, Secondary Consumers, Tertiary Consumers, one Decomposer Properly labeled using vocabulary words Trophic levels are identified Transfer of energy is shown in the right direction (arrows)

16. RACE TO THE HSA

17. Each class will start off with 10 points for the day Points will be deducted if the class is not following our classroom norms The class with the most points at the end of each month will win!

18. RACE to the HSA What type of prizes will be offered? –Breakfast party –Pizza party –Icecream social –Field Trip –Guest Speakers