5.9B (R) - Science

Food Chains and Food Webs


describe how the flow of energy derived from the Sun, used by producers to create their own food, is transferred through a food chain and food web to consumers and decomposers
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The Lion King - Circle of Life


  • Plants are called producers because they create their own food through photosynthesis using energy from the Sun.
  • Producers are the plants in the ecosystem.
  • The plants provide oxygen for all animals.
  • They also provide food for herbivores
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  • Animals are called consumers, because they cannot make their own food. They need to consume (eat) plants and/or animals to survive.
  • Include all of the animals in the ecosystem.
  • Animals provide the plants with carbon dioxide needed for photosynthesis.
  • Some consumers also help plants reproduce.
  • For example the PLANT SEEDS can stick to animals and be taken to a new location and deposited.
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Decomposers and scavengers break down dead plants and animals. They also break down the waste (poop) of other organisms. Decomposers are very important for any ecosystem. If they weren't in the ecosystem, the plants would not get essential nutrients, and dead matter and waste would pile up.

There are two kinds of decomposers, scavengers and decomposers.

Scavengers are animals that find dead animals or plants and eat them. While they eat them, they break them into small bits. In this simulation, flies, wasps and cockroaches are scavengers.Earthworms are also scavengers, but they only break down plants.

Once a scavenger is done, the decomposers take over, and finish the job. Many kinds of decomposers are microscopic, meaning that they can't be seen without a microscope. Others, like fungi, can be seen.

Food Chains , Food Webs , Energy Pyramid - Education Video for kids by makemegenius.com
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How does the energy transfer to from one organism to the next?

The Arrows that are in the food chain/food web are very important. They show how the energy is transferred.

(See how energy is transferred in the food chains pictured above and below)

The original source of energy is the SUN. Sometimes it is pictured in the food chain sometimes it is not.

FOOD CHAINS START WITH THE PRODUCER and move to the other consumers

Food Web
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Ticket out the Door

  1. List the producers
  2. List the consumers
  3. List the herbivores
  4. List the omnivores
  5. List the carnivores
  6. What are the top level consumers?
  7. Where are the decomposers?