AIM: How do plants & animals depend on each other and their physical environment? 4/25/13 DO NOW: 1. Put last night’s Review Sheet in the basket. 2. Pick up your scantron & write your homework assignment on it. HOMEWORK: 1. Read p. 55-57 2. Answer questions #1-36 on p. 58-65 on the scantron. DUE – Tomorrow - 8 AM What is a food chain? A model for showing the flow of food energy from one organism to the next in a community. Explain what the arrows on the food chain represent? Who’s eating what The directional flow of energy Where do producers get their energy? The sun Where do consumers get their energy? Eat other organisms What is the primary source of energy on Earth? The Sun Why? How are primary, secondary, and tertiary consumers different? Primary consumers – eat on plants Secondary consumers – eat primary consumers Tertiary consumers – eat secondary consumers Identify the Primary, Secondary, & Tertiary consumers in the food chain. What is the function of the decomposers? Break down the waste and remains of dead organisms ILS Question 1. What does the leopard seal eat? 2. What do the arrows in the diagram represent? 3. Identify the herbivore in the diagram. ILS Question Base your answers to questions 1 through 3 on the diagram below and on your knowledge of science. The diagram represents an ecosystem. 1. Identify one producer shown in the diagram. 2. Identify one consumer in the diagram. 3. What is the original source of energy for this ecosystem? What does an Energy pyramid show? Energy lost through a food chain Which organisms have the greatest energy in a energy pyramid? The producers (bottom) Describe the amount of energy that is passed along a food chain based on the energy pyramid. Energy is lost as you move along the food chain. 90% energy lost? What is a food web? Many food chains linked together in an ecosystem What is a predator? An animal that hunts, kills, & eats other animals What is a prey? Animals that are killed and eaten Give an example of a predator-prey relationship. ILS Question Base your answers to questions 1 and 2 on the diagram below. which shows a partial food web. 1. How many organisms in this food web feed on the mice? 2. Which group of organisms is missing from this food web? ILS Question Base your answers to questions 1 and 2 on the food web below and on your knowledge of science. 1. Which organism labeled in this food web provides energy, either directly or indirectly, to all of the other organisms? 2. Explain why the amount of food available to the slug population might increase if the aphid population decreased. ILS Question Base your answers to questions 1 through 3 on the food web below and on your knowledge of science 1. Identify two consumers in this food web that eat producers. 2. Explain why the foxes shown in this food web are categorized as carnivores. 3. Both owls and hawks eat mice. Explain why the removal of mice from this food web would likely affect owls more than hawks.