Skip to main content
All Free Worksheets
ScienceBeginnerKS2 (Years 3–6) · Ages 7–11

KS2 Science: Food Chains and Ecosystems

A KS2 science worksheet on food chains, covering producers, consumers, predators, prey, and the impact of changes to an ecosystem.

Generate your own - free

Learning objectives

  • Understand that food chains show the transfer of energy from one organism to another
  • Identify producers, primary consumers, secondary consumers, and predators
  • Predict the impact of changes to a food chain

Instructions

Answer all questions. Where asked to draw or complete a food chain, use arrows to show the direction of energy flow.

Questions

1

What is a food chain?

2

What is a producer? Give an example.

3

Complete this food chain: grass → ___ → fox

4

In the food chain: oak tree → caterpillar → blue tit → sparrowhawk - what is the sparrowhawk?

5

What does the arrow in a food chain represent?

6

Why are all food chains started by a plant (producer)?

7

In the food chain: grass → rabbit → stoat → owl - what would happen to the owl population if all the rabbits disappeared?

8

Name one predator and its prey from a food chain you know.

9

Why are there usually more producers than top predators in an ecosystem?

10

A disease kills most of the grass in a field. Predict what will happen to the rabbit and fox populations. Explain your answer.

Before you check the answers

Generate a custom Science worksheet - free

Sign up and create a fresh worksheet on any topic, tailored to your child's exact level. Takes 30 seconds.

Sign Up Free - 5 Worksheets Included

No credit card needed · Thousands of parents & teachers use us weekly

Answer Key

Teacher / Parent copy
1.A food chain shows how energy is passed from one living thing to another through eating.
2.A producer is a plant that makes its own food using sunlight (photosynthesis). Examples: grass, oak tree, seaweed.
3.Any suitable primary consumer, e.g. rabbit, mouse
4.A predator / secondary consumer / tertiary consumer
5.The direction of energy transfer (from what is eaten to what eats it)
6.Plants can make their own food using sunlight through photosynthesis. They are the original source of energy for all other organisms in the chain.
7.The owl population would decrease because owls rely on stoats for food, and stoats rely on rabbits. Fewer rabbits means fewer stoats, which means less food for owls.
8.Any correct example, e.g. fox (predator) - rabbit (prey); shark - fish; lion - zebra
9.Energy is lost at each stage of the food chain, so there is less energy available for each level. This means fewer organisms can survive at higher levels.
10.Rabbit population would fall (less food). Fox population would then also fall (fewer rabbits to eat). The whole food chain is disrupted when the producer is affected.

Teacher note

Children commonly confuse the direction of arrows in food chains - remind them that arrows show the direction of energy flow, not "what eats what." Question 10 is a prediction question requiring a multi-step explanation, appropriate for Year 5–6.

Want a worksheet on a different topic?

Our AI generates a unique Science worksheet on any topic - tailored to the exact age and difficulty you need, with a full answer key, in seconds.

Create Your Own - Free

3 free worksheets · No credit card · Ready in seconds