Food Chains & Energy Transfer
Construct and interpret food chains identifying producers, predators, and prey, and understand energy transfer between trophic levels
Lesson
Set out your lesson
“A food-chain arrow points from food to eater. It represents transfer of matter and chemical energy. Sunlight is an energy input, not an organism. Organisms use energy, and some spreads as heat; not all energy reaches the next consumer. Safety: Use written organisms only; do not feed or remove wildlife. Stop: Stop after the revised prediction; no feeding experiment or population test is needed.”
Bring to the table
- Paper
- Pencil
Extra for the adult
Worked example. Without caterpillars, birds lose the food shown, so they may leave fewer offspring or move elsewhere. Oak leaves may suffer less caterpillar feeding. Alternative prey could reduce the effect on birds, so a decline is a prediction, not a guaranteed count.
Optional challenge. Add a second insect eaten by the bird. Explain how this turns one path into part of a food web. Adult key: The second insect adds another feeding link, so the drawing now has joined food-chain paths.
What to notice. Keep both chain versions and the revised prediction. Record any adult help with arrow direction or the meaning of primary consumer.
Share and support
Family records and proof options
Keep a record of your learning
Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.
Learning resources
Extra practice links — they do not replace Gakuva’s teaching approach.
PhET Interactive Simulations · Practice link — not the full lesson
Natural Selection
Before you open · source notes
Natural Selection supports hands-on exploration for Food Chains & Energy Transfer. Not every lab worksheet.
Free interactive page, no sign-in required for the tested path.
Before you openAsk the learner what they changed in the sim or page and what they observed.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public PhET Interactive Simulations page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
PhET Interactive Simulations. “Natural Selection.” External page; Gakuva does not copy, host, embed, or redistribute materials.
Unknown — link only
Check understanding
- Construct a food chain with at least four organisms, labelling producer, primary consumer, predator
- Define producer, predator, and prey with examples
- Interpret a given food chain to predict what happens if one organism is removed
“Can your child build a food chain for a woodland and point out which organisms are producers, which are predators, and which are prey?”
Curriculum record
- Type
- Conceptual
- Subject
- Science
- Domain
- Ecosystems & Habitats
- Age range
- Ages 8–10
Standards