4th grade-ch. 3 lesson 2 how does energy flow in ecosystems
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Ch. 3 Lesson 2How Does Energy
Flow in Ecosystems?
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sunlight•main energy source for life on Earth
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producers
• organisms that make their own food
• examples: plants, algae
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consumers•organisms that cannot make their own food
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consumer
consumer
producer
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herbivore•consumer that eats only plants
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carnivore•consumer that eats only animals
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omnivore•consumer that eats both plants & animals
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scavenger•consumer that eats dead plants & animals
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decomposers• digest waste & remains of dead plants & animals
• examples: bacteria, fungi & insects
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food chain• Always begins with sunlight
• Transfers energy (nutrients & minerals) in 1 direction by eating & being eaten
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food web
• system of overlapping food chains
• flow of energy branches in many directions
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Identify the:
1. Producers 2. Primary Consumers 3. Secondary Consumers 4. Herbivores 5. Carnivores 6. Omnivores 7. What elements are missing from this food web?
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Construct a Food web using the following animals:
• SNAKE, CORN , CATERPILLAR, DEER, CROW, MOUSE, COUGAR, SQUIRREL, MICROORGANISMS (decomposers)
Draw pictures and label each organism. Draw arrows between
them.
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What do decomposers do?
DAY Bread 1
(Location)
Bread 2
(Location)
Bread 3
(Location)
1
2
3
4
5
6
7
Prediction: I predict that the _____ bread will have more mold.
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herbivore•consumer that eats only plants
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food web• System of overlapping food
chains
• Flow of energy branches in many directions
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scavenger•Consumer that eats dead plants & animals
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sunlight•main energy source for life on Earth
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omnivore•consumer that eats both plants
& animals
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carnivore•consumer that eats only animals
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producers•organisms that make their own food
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decomposer•Digests waste & remains of dead plants & animals
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sunlight•Food chains
always begin with _______
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food chain• Transfers energy (nutrients & minerals) in 1 direction by eating & being eaten