Objectives Learn how a food chain is different from a food web Learn how to create a food chain and food web Learn how to analyze the interdependence of one organism to another Food Web Life in an ecosystem requires a source of ID: 543791
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Slide1
Aim: How is a food chain different than a food web?
ObjectivesLearn how a food chain is different from a food web.Learn how to create a food chain and food web.Learn how to analyze the interdependence of one organism to another.
Food WebSlide2
Life in an ecosystem requires a source of
energy. Slide3
Food Chains and Food Webs are similar because they both
model the flow of energy in an ecosystem.Slide4
However, food chains are simple!!
A food chain is a simplified way to look at the energy that passes from producers to consumers.Because we know each predator does not eat only 1 type of prey.Slide5Slide6
What is a Food Web?
A more realistic way of looking at the relationship of plants and animals in an environmentSeveral food chains linked togetherA predator from one food chain may be linked to the prey of another food chainSlide7
Food Webs are more realistic and more complicated.
notice all the different arrowsSlide8
Food Webs are realistic because predators eat mor
e than 1 type of prey.Slide9
Lesson Summary Questions
What does all life in an ecosystem require?How is a food chain and a food web similar?How is a food chain different than a food web?What is another name for producer?What are consumers also called?Slide10
Check for Understanding!!!7. Create a correct
food chain with the following organisms below. Simple Food ChainSlide11
Check for Understanding!!! 8. Create an appropriate food chain
for the pond ecosystem below. Medium Difficult Food ChainSlide12
Check for Understanding!!!9. Create an appropriate
food chain for the pond ecosystem below.Difficult Food Chain
Hawk
Deer
Raccoon
Frog
Dragonfly
Water liliesSlide13
Check for Understanding!!!10. Create an appropriate food web
with the organisms below.Simple Food WebSlide14
Check for Understanding!!!11. Create an appropriate food web
for the pond ecosystem below.Difficult Food WebSlide15
Let’s Check for UnderstandingRegents Based Questions
1. The diagrams represent four members of a food chain. Which sequence best represents the transfer of energy between these organisms?toads – predaceous insects – herbivorous insects – plantspredaceous insects – herbivorous insects – plants – toads
plants – herbivorous insects – predaceous insects – toadsplants – herbivorous insects – toads – predaceous insectsSlide16
Let’s Check for UnderstandingRegents Based Questions
2. Which sequence shows a correct pathway for the flow of energy in a food chain?bacteria – grass – fox – owlgrass – grasshopper – frog – snakefungi – beetle – algae – mousealgae – snake – duck – deerSlide17
Let’s Check for UnderstandingRegents Based Questions
3. A food web is more stable than a food chain because a food webtransfers all of the producer energy to herbivoresreduces the number of niches in the ecosystemincludes alternative pathways for energy flowincludes more consumers than producersSlide18
Let’s Check for UnderstandingRegents Based Questions
4. Which type of model provides the most complete representation of the feeding relationships within a community?a material cyclea predator-prey associationa food chaina food webSlide19
Analyzing Changes to the Food Chain
Each situation describes a change in a food chain environment. In complete sentences describe how the changes will affect the organisms in each food chain. Support your answers with specific details