1. ENVIRONMENTAL SCIENCE MR. MILLER Food Webs and Chains

2. Beginning of Class Directions http://videos.howstuffworks.com/hsw/10359-organisms-and-environment-the-energy-flow-video.htm Please have a seat and take some time to look over the notes worksheet. Look at the diagrams, and take a close look at the vocabulary words. If you can use prior knowledge to place any of the vocabulary words on the pyramid diagram, feel free to do so. During the video, listen for any of the vocabulary words listed on your page, and pay close attention to any diagrams explained in the video. After the video we can work on the resource sheet as a class to get you ready for the activity.

3. What’s the Difference?

4. Food Chain vs. Food Web Food Chain = Flow of energy through trophic levels. Food Web = Complex interactions between predators and prey represented by arrows.

5. Definitions Ecosystem  natural unit consisting of all plants, animals and micro-organisms (biotic factors) in an area functioning together with all of the non-living physical (abiotic) factors of the environmentbioticabiotic Carnivore  A flesh eating organism Herbivore  A plant eating organism Omnivore  An organism that eats both plants and animals

6. Definitions Producer-  Organisms that produce their own food (autotrophs) Consumer-  Organisms that cannot make their own food (heterotrophs)  Primary: eat producer  Secondary: eat primary  Tertiary: eat secondary Decomposer-  Organisms that use dead organisms as food and return elements to the earth.

7. End of Class Activity Put your name at the top of your sticky note. On your sticky note…  Draw a food chain pyramid, explaining each level to the best of your ability. Please give an example of an organisms in each level.  Also, what can you tell me about the transfer of energy between each trophic level? When the bell rings, hand in your paperwork and place your sticky note on the door as you leave the room. Have a nice day!!!