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Feeding Relationships

In this worksheet, students get a description of food chains and food webs showing feeding relationships in an ecosystem.

Key stage:  KS 3

Curriculum topic:  Biology: Interactions and Interdependencies

Curriculum subtopic:  Relationships in an Ecosystem

Difficulty level:  

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QUESTION 1 of 10

Organisms contain a store of chemical energy. Animals eat plants or other animals in order to get this energy, whereas plants make their own food during photosynthesis.

Food chains (see diagram) are used to show what eats what in a specific environment. The arrows show the direction in which energy travels. In the diagram the vole eats the grass and is eaten by the owl. They point to the organisms that eat the ones before the arrow.

A lot of food chains together make up a food web (see diagram), as organisms do not only feed on one thing.

 

 

 

 

Food chains (or webs) always start off with organisms that can make their own food, e.g. plants. These are called producers. Animals are consumers, because they have to eat other things. A food chain ends with a top predator. Predators hunt for food and they are carnivores, e.g. they eat meat. Animals that feed on plants only are called herbivores, whereas omnivores feed on both animals and plants. Consumers can be primary (like the vole), secondary (like the owl) and even tertiary (like the organism that would eat the owl, even if it is not shown in this specific food chain).

What are organisms trying to get by feeding?

What process helps plants make their own food?

Take a second look at the food web shown in the introduction. Choose one food chain you can make from this food web.

green plant → goat→ lion

green plant → lion → goat

green plant → mouse → kite

Choose another possible food chain from the same food web.

rabbit → green plant → wild cat → lion

green plant → rabbit → wild cat → lion

mouse → green plant → snake → kite

Name the producer in this food chain.

green plant → rabbit → wild cat → lion

Name the primary consumer in this food chain.

green plant → rabbit → wild cat → lion

Name the top predator in this food chain.

green plant → rabbit → wild cat → lion

What do we call organisms that feed only on plants?

Complete the sentence.

An omnivore eats ______________ .

plants

animals

both of the above

What type of energy does food contain?

  • Question 1

What are organisms trying to get by feeding?

CORRECT ANSWER
energy
EDDIE SAYS
Organisms get energy from food.
  • Question 2

What process helps plants make their own food?

CORRECT ANSWER
photosynthesis
EDDIE SAYS
Plants make their own food through photosynthesis.
  • Question 3

Take a second look at the food web shown in the introduction. Choose one food chain you can make from this food web.

CORRECT ANSWER
green plant → goat→ lion
EDDIE SAYS
green plant → goat → lion

The second option shows that the lion is eaten by the goat, which is wrong. The third option shows that kites eat mice, which is not shown in the food web.
  • Question 4

Choose another possible food chain from the same food web.

CORRECT ANSWER
green plant → rabbit → wild cat → lion
EDDIE SAYS
The second option is correct. The other two start with animals, but they are supposed to start with a plant.
  • Question 5

Name the producer in this food chain.

green plant → rabbit → wild cat → lion

CORRECT ANSWER
green plant
EDDIE SAYS
Plants are the producers, so it is the green plant.
  • Question 6

Name the primary consumer in this food chain.

green plant → rabbit → wild cat → lion

CORRECT ANSWER
rabbit
EDDIE SAYS
Primary consumers eat plants, so it is the rabbit.
  • Question 7

Name the top predator in this food chain.

green plant → rabbit → wild cat → lion

CORRECT ANSWER
lion
EDDIE SAYS
Top predators are the last consumers in the food chain, so it is the lion.
  • Question 8

What do we call organisms that feed only on plants?

CORRECT ANSWER
herbivore
herbivores
EDDIE SAYS
Herbivores feed only on plants.
  • Question 9

Complete the sentence.

An omnivore eats ______________ .

CORRECT ANSWER
both of the above
EDDIE SAYS
Omnivores eat plants and animals.
  • Question 10

What type of energy does food contain?

CORRECT ANSWER
chemical
chemical energy
EDDIE SAYS
Food contains chemical energy.
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