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Mc kay kyle_energy flow food webs
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Author: Kyle McKay6th Grade Science
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Big Ideas...• Energy begins with the sun
• Plants absorb sunlight to make sugars
• The energy travels up our ecosystem through the different energy levels
• Producers- Consumers - Decomposers
• There are different types of consumers
• Food Chains show the flow of energy
• Energy is transferred as you move up the food chain
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Trophic LevelsTrophic levels refer to the position of an organism
in a food chain – this position can change depending on what an organism is eating
The Trophic Levels
• Producer
• Primary Consumer
• Secondary Consumer
• Tertiary Consumer
• Quaternary Consumer
• Decomposer
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ProducersProducers are plants (typically) that have the ability to capture the energy from the sun and convert it into energy in the usable form of sugar using photosynthesis
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Primary ConsumersOrganisms that eat plants are called primary
consumers because they are first in the food chain.
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Secondary ConsumersOrganisms that eat primary consumers are called secondary consumers because they are second in
the food chain.
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Tertiary ConsumersOrganisms that eat secondary consumers are called
tertiary consumers because they are third in the food chain. (Tertiary means three)
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Quaternary Consumers
Organisms that eat tertiary consumers are called quaternary consumers because they are fourth in
the food chain. (Quaternary means four)
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DecomposersOrganisms that break down dead organisms that get recycled back into the Earth as nutrients that the producers are able to use for continued growth.
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Types of Consumers
•Herbivore
•Carnivore
•Omnivore
•Scavenger
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HerbivoresOrganisms that only eat producers (plants)
Grasshoppers are an example of a herbivore
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CarnivoresOrganisms that only eat other animals (meat-eaters)
The African Lion is an example of a carnivore
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OmnivoresOrganisms that eat both plants and animals are called omnivores
Humans are an example of omnivores
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ScavengersOrganisms that eat dead animals, usually the remains of a kill left
over from another organism.
Vultures are an example of scavengers
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Flow of EnergyIn a food chain we use arrows to show where the
energy is flowing.
Energy
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Food ChainsA food chain is how we follow the flow of energy through an ecosystem with only one organism at
each level.
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Energy Levels• At each level of the food chain, each organism uses up
some of the energy before it gets passed on to another organism
• Roughly 90% of the energy is transferred at each level, leaving only 10% of the energy as we move up the food chain
• This is why ecosystems can only support 3 or 4 levels of consumers because anything above that is receiving an insufficient amount of energy
• This is why it’s important to eat your fruits and vegetables, primary consumers get the most energy out of what they are eating!
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Summary...
• Energy begins with the sun
• Plants absorb sunlight to make sugars
• The energy travels up our ecosystem through the different energy levels
• Producers - Consumers - Decomposers
• There are different types of consumers
• Food Chains show the flow of energy
• Energy is transferred as you move up the food chain
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References• Background Web Picture
– Author: Public Domain
– Image: Source
• Picture of Sunset
– Author: Public Domain
– Image: Source
• Picture of Flowers
– Author: Public Domain
– Image: Source
• Picture of Whitetail Buck
– Author: Public Domain
– Image: Source
• Picture of Wolf
– Author: Public Domain
– Image: Source
• Picture of Black Bear
– Author: Public Domain
– Image: Source
• Picture of Kid Hunting
– Author: Public Domain
– Image: Source
• Picture of Mushroom
– Author: Public Domain
– Image: Source
• Picture of Grasshopper
– Author: Public Domain
– Image: Source
• Picture of African Lion
– Author: Public Domain
– Image: Source
• Picture of People Eating
– Author: Public Domain
– Image: Source
• Picture of Grass
– Author: Public Domain
– Image: Source
• Picture of Grasshopper 2
– Author: Public Domain
– Image: Source
• Picture of Mouse
– Author: Public Domain
– Image: Source
• Picture of Snake
– Author: Public Domain
– Image: Source
• Picture of Hawk
– Author: Public Domain
– Image: Source
• Picture of Vulture
– Author: Public Domain
– Image: Source
– Resources
– Trophic Levels
– Qld science teachers
– Geography4Kids
– Images
– Public Domain Images