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Engage in an interactive activity exploring energy flow in food webs, discussing variables influencing dissolving rates and energy transfers. Understand the significance of food chains through a hands-on experiment.
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WARM UP 4/9 – write in notebook 1. What was tested for each experiment? 2. Which variable influences rate of dissolving the most?
With a partner discuss: • If the food chain had continued to the next level, what percentage of energy would the next level consumer have received from the previous consumer? • How much water would you have transferred into the the next level consumer’s cup? • Judging from this activity, why do you think most food chains never go higher than 2nd or 3rd level consumers?
Fill in the blanks http://schoolworkhelper.net/wp-content/uploads/2011/01/EnergyPyramid-26a65z5.gif
Fill in the Blanks C kcal Bkcal 250 kcal A kcal http://www.proprofs.com/quiz-school/upload/yuiupload/244802756.jpg
It’s your turn… • Create an energy pyramid with the correct food chain and energy flow. • Remember – only 10% of the energy is absorbed from level to level! • Ex: Hawk (2nd carnivore) – 2 kcal Snake (1st carnivore) – 20 kcal Grasshoppers (omnivore) – 200 kcal Grass (producer) – 2000 kcal
Number Pyramid Biomass Pyramid
Energy Flow Game • http://puzzling.caret.cam.ac.uk/pregame.php?game=6&PHPSESSID=5d8a9862ef94e537a9a790c5512b4026