food chain and food webs - biology is life! · objectives • students will construct a food chain...
TRANSCRIPT
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FOOD CHAIN AND FOOD WEBS JENNIFER ORLANDO
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NYS SCIENCE TEACHING STANDARDS
• Standard 4: Students will understand and apply scientific concepts, principles, and theories pertaining to the physical setting and living environment and recognize the historical development of ideas in science. • Key Idea 6: Performance Indicatory 6.1 a, 6.3a.
• Plants and animals depend on each other and their physical environment.
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OBJECTIVES
• Students will construct a food chain for a particular ecosystem.
• Students will create a food web based on their knowledge of producers, consumers, and decomposers.
• Students will discover the impact of environmental changes on a food web and it’s occupants.
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FOOD CHAINS AND FOOD WEBS
• http://www.youtube.com/watch?v=cWh-XKhh8xo
• From what you know about ecosystems and the relationships within them, explain in your own words what Mufasa is trying to help Simba understand.
“Everything you see exists together in a delicate balance as king you need to understand that balance and respect all creatures. From the crawling at to the
leaping antelope.”
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FOOD CHAIN: A SEQUENCE THAT LINKS SPECIES BY THEIR FEEDING RELATIONSHIPS.
EXAMPLE FROM LION KING:
Grass Antelope Lion
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PRODUCERS VS. CONSUMERS
Producers: organisms that obtain energy from non living resources. (make their own food)
Autotrophs
Consumers: organisms that obtain energy from living or once living resources. (eat plants and animals)
Heterotrophs Decomposers: break down organic material
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TYPES OF CONSUMERS
• Herbivores: eat only plants
• Carnivores: eat only animals
• Omnivores: eat both plants and animals
• Detritivores: eat dead organic material
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TROPHIC LEVELS
• Primary Consumer: first consumer above producer trophic level (herbivores)
• Secondary Consumers: carnivores that eat herbivores
• Tertiary Consumers: carnivores that eat secondary consumers
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GROUP WORK
http://www.youtube.com/watch?v=cWh-XKhh8xo (1:35-2:25)
Create a Food Chain on the chalk board using the cards you were provided with.
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FOOD WEB • A MODEL THAT SHOWS THE
COMPLEX NETWORK OF FEEDING RELATIONSHIPS AND THE FLOW OF ENERGY WITHIN AND SOMETIMES BEYOND AN ECOSYSTEM. • Shows interconnection of food chains
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EXIT TICKET
• Video Clip: (2:26-4:15)
Using what you now know about food chains and the dynamics of an ecosystem to explain what would
happen if a population of one species died out due to disease.
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HOMEWORK
• Answer Questions at the end of worksheet.