AIM: What are Food Chains, Webs and Pyramids?
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AIM: What are Food Chains, Webs and Pyramids?. Objectives. Construct models to demonstrate that organisms are related by how energy is transferred in an ecosystem. AIM: What are Food Chains, Webs and Pyramids?. Vocabulary. Food chain Food pyramid Food web. - PowerPoint PPT Presentation
Transcript of AIM: What are Food Chains, Webs and Pyramids?
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AIM: What are Food Chains, Webs and Pyramids?Construct models to demonstrate that organisms are related by how energy is transferred in an ecosystem
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Food chainFood pyramidFood web
AIM: What are Food Chains, Webs and Pyramids?
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Examine this picture
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What is this caterpillar doing
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Examine this picture
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Now what happened to the caterpillar ?
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Arrange these organisms as to WHO eats WHO
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What does the food chain tell us about the relationship of organisms in that food chain?What does the food chain tell us about the flow of energy in the chain?
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DEFINES: the flow of energy from one animal to anotherIt defines who eats who
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What might happen if there were no caterpillars
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What might happen if there were less mice?
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WRITE DOWN A FOOD CHAIN IN YOUR NOTEBOOK for hawks, berries, & birds
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BERRIES
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BERRIESBIRDSHAWKS
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EXAMINE THESE TWO FOOD CHAINSLeaves worms birdberries Squirrels hawks
However, do birds only eat worms?What else do birds eat?What else might hawk eat?
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Does this give MORE detail or LESS detail then the food chain model?
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A food web shows more interactions of organisms then a food chain!
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In a FOOD WEB, Green Plants are referred to as ?
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In a FOOD WEB, Green Plants are referred to ?
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What level consumer are the rabbit, mouse, grasshopper and termite?
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What level consumer are the rabbit, mouse, grasshopper and termite?
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What level consumer are the the fox, snake, shrew, and bird?
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What level consumer are the the fox, snake, shrew, and bird?
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Now what level consumer is the mouse?
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Now what level consumer is the mouse?
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What level is the fox now?
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What level is the fox now?
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What happens to ALL plants and animals after they die?
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What happens to ALL plants and animals after they die?
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What Animal is this?How many mice does he need to eat per day/week?
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How many grasshoppers do two mice need to eat per day or per week week?
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How much grass do those hoppers need?
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What is grass called?
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What are the hoppers called?
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What are the mice called?
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What is the hawk called?
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What is the hawk called?
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This in an example of ???
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FOOD PYRAMID
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It takes more animals of a lower level to support the level above it
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As you move up the pyramid, there is less and less energy
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It take more grass to support a population of hoppers
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It take more hoppers to support a population of mice
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It take more many mice to support just on hawk!
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Decreasing Number of OrganismsDecreasing Amount of Energy
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A food pyramid is a model of a food chainShows the flow of energyShows the amount of energy in terms of the number of organismsShows THAT greater populations of organisms are needed at lower levels on the pyramid, to support smaller populations at the top of the pyramid.
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REVIEW VOCABULARY AND THE AIM AND THE OBJECTIVES
AIM: What are habitats and niches?
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Construct models to demonstrate that organisms are related by how energy is transferred in an ecosystemFood chain, Food pyramid,Food web
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Class Activity:
Worksheets
Word Problems
AIM: What are habitats and niches?
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Homework:
INTERNET QUESTIONS
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AIM: What are habitats and niches?
