Gizmo.docx - Name Kameron Bolton Date Student Exploration...

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Name: Kameron Bolton Date: 8/28/18 Student Exploration: Food Chain Vocabulary: consumer, ecosystem, energy pyramid, equilibrium, food chain, population, predator, prey, producer Prior Knowledge Questions (Do these BEFORE using the Gizmo .) The Food Chain Gizmo™ shows a food chain with hawks, snakes, rabbits, and grass. In this simulation, the hawks eat snakes, the snakes eat rabbits, and the rabbits eat grass. 1. Producers are organisms that do not need to eat other organisms to obtain energy. A. Which organism is a producer in this food chain? Grass____________________________ 2. B. Where does the producer get its energy? From the sun__________________________________ 3. Consumers must eat other organisms for energy. Which organisms are consumers in this food chain? ______Hawks_________________________________________________________ Gizmo Warm-up The SIMULATION pane of the Gizmo shows the current population , or number, of each organism in the food chain. 1. What are the current populations of each organism? Hawks: 42_____ Snakes: _____278 Rabbits: 2566_____ Grass: _____ 27300

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2. Select the BAR CHART tab, and click Play ( ). What do you notice about each population as time goes by? What I noticed about the population it is very balance _________________________________________________________________________ If populations don’t change very much over time, the ecosystem is in equilibrium . 3. Notice the populations decrease as you go from the bottom of the food chain to the top. Why do you think this is so? ________The amount of biomass available in each level of the pyramid or food chain. ______________________________________________ _________________________________________________________________________ This diagram, showing decreasing populations at each level, is called an energy pyramid . Activity A: Predator-prey relationships Get the Gizmo ready : Click Reset ( ). Check that the BAR CHART tab is selected.
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