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Food Webs and Food Chains

By Patsy
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"Where do animals and plants get their energy from?"

  Understandings & Objectives


 At A Glance

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Core Understandings
  • Animals and plants get the energy to move and grow from the food they eat.
  • Ecosystems are comprised of both food chains and food webs.
  • Plants are the producers in a food chain because they receive energy from the sun to create sugar; they are eaten by consumers.
  • Consumers are divided into three categories: herbivores, carnivores, and omnivores. Decomposers feed on the decaying matter.
  • Food webs are a more accurate diagram of an ecosystem because most animals have more than one food source.
Learning Objectives
  • Students will participate in the group interactive learning strategy, KWL. They will volunteer prior knowledge about what they know about food webs and ecosystems.
  • Students will browse the web links; they will explore examples of food webs as well as watching a short movie.
  • Students will then create a complex food web, with themselves included in the web, out of construction paper.
  • Students will write a one page fantasy piece about what would happen to spiders if flies became extinct.
  • Students will take a survey as a form of assessment.
California Content Standards
English and Language Arts
Grade Four
ELA.4.2.0. Writing Applications (Genres and Their Characteristics)
ELA.4.2.1. Write narratives:
a. Relate ideas, observations, or recollections of an event or experience.
b. Provide a context to enable the reader to imagine the world of the event or experience.
c. Use concrete sensory details.
d. Provide insight into why the selected event or experience is memorable.
Grade Four
Life Sciences
SCI.4.2. All organisms need energy and matter to live and grow.
SCI.4.2.a. Students know plants are the primary source of matter and energy entering most food chains.
SCI.4.2.b. Students know producers and consumers (herbivores, carnivores, omnivores, and decomposers) are related in food chains and food webs and may compete with each other for resources in an ecosystem.