---
title: "Food Chains & Energy Transfer"
description: "Construct and interpret food chains identifying producers, predators, and prey, and understand energy transfer between trophic levels"
canonical: https://lightmysky.com/learn/science/food-chains-and-energy-transfer-mt_oB-L8EVdIP
source: https://lightmysky.com/learn/science/food-chains-and-energy-transfer-mt_oB-L8EVdIP.md
retrieved: 2026-10-19
---

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# Food Chains & Energy Transfer

Construct and interpret food chains identifying producers, predators, and prey, and understand energy transfer between trophic levels

Subject: Science · Area: Ecosystems & Habitats · Ages 8 to 9
Page: https://lightmysky.com/learn/science/food-chains-and-energy-transfer-mt_oB-L8EVdIP

## Ready when they can

- 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

## Lesson: Energy Along a Food Chain

You already know a food chain shows who eats whom, starting with a producer and ending with a predator. Now let's add something new: energy. Every bit of energy in a food chain starts with the sun, and each living thing that eats only gets to keep some of it.

*(drawing: This chain has four organisms: a producer, a primary consumer, another consumer, and a top predator.)*

**Example.** Start with the oak tree. It is the producer, since it makes its own food from sunlight. The caterpillar eats oak leaves, so it's the primary consumer. The robin eats the caterpillar, and the hawk eats the robin. The hawk is the top predator: nothing in this woodland hunts and eats it.

Energy shrinks at every step. The oak tree captures sunlight to grow leaves. When the caterpillar eats those leaves, it only keeps some of that energy, since the tree already used part of it to live and grow. The same happens when the robin eats the caterpillar, and again when the hawk eats the robin. That's why food chains rarely stretch past four or five living things: there isn't enough energy left to support more.

**Tip.** If you remove one organism from a food chain, everything connected to it changes too. Losing the caterpillars would leave robins with less food, and losing the robins would leave hawks with less food.

**Recap.** Energy flows from producer to predator, shrinking at every step, and removing one link changes the whole chain.

## Practice

24 questions on this page, each with its working shown.

## Needs first

- [Rainforest Food Webs](https://lightmysky.com/learn/science/rainforest-food-webs-mt_1LFVPjdGg-)
- [Animal Nutrition](https://lightmysky.com/learn/science/animal-nutrition-mt_E1wR8IfCV6)
- [Simple Food Chains](https://lightmysky.com/learn/science/simple-food-chains-mt_EygMHKs8Ed)
- [Ecology Vocabulary](https://lightmysky.com/learn/science/ecology-vocabulary-mt_M7XhBBzYof)
- [Ocean Food Webs](https://lightmysky.com/learn/science/ocean-food-webs-mt_OnV_DTp5i8)

## Opens up

- [Matter Cycling in Ecosystems](https://lightmysky.com/learn/science/matter-cycling-in-ecosystems-mt_0ajzcoKAKw)
- [Insects in ecosystems](https://lightmysky.com/learn/science/insects-in-ecosystems-mt_r6oKXpN0er)
- [Food Webs & Interdependence](https://lightmysky.com/learn/science/food-webs-and-interdependence-mt_URTJbS3hhs)
- [Reading Food Web Diagrams](https://lightmysky.com/learn/science/reading-food-web-diagrams-mt_uVaS12lN1i)