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Food Webs

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Rose → aphid → ladybird. In this food chain, the ladybird is the secondary consumer.

Food Webs

Food chains and food webs show how energy flows between living things. Producers, consumers, and predators all connect to keep ecosystems balanced.

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Fascinating Fact:

Every food web begins with plants, because they are the producers that make their own food using sunlight.

In KS2 Science, students learn how food chains and food webs describe feeding relationships in ecosystems. They show how energy passes from producers to herbivores, carnivores, and decomposers.

  • Producer: A living thing, like a plant, that makes its own food using sunlight.
  • Consumer: An animal that eats plants or other animals to get energy.
  • Food Web: A network of connected food chains showing how energy flows in an ecosystem.
What is a food chain in science?

A food chain shows how energy is passed from one living thing to another, starting with a plant and ending with animals at the top.

What is the difference between a food chain and a food web?

A food chain is a single path of energy flow, while a food web links many food chains together to show how organisms are connected.

Why are plants important in food chains?

Plants are important because they are producers. They make their own food using sunlight and start the flow of energy in every food chain.

1 .
Which of the following support all life on Earth?
Insects
Mammals
Carnivores
Green plants
Because plants create their own food from sunlight, using photosynthesis, they are the only means of transferring energy from the Sun to all life on Earth
2 .
What does a decomposer do in a food web?
They provide food for herbivores
They recycle nutrients by feeding on dead and decaying materials
They convert energy from sunlight into food
They create soil
Decomposers include earthworms, woodlice, fungi and bacteria, and represent the end of any food web because they feed on dead organisms
3 .
Which of these species is a producer?
Polar bear
Algae
Shrimp
Cod
Producers are always green plants
4 .
Which consumers eat only plants?
Herbivores
Omnivores
Carnivores
Other plants
Herbivores are called primary consumers because they are able to gain all their energy through digesting plants
5 .
What must be at the beginning of every food chain?
A herbivore
A green plant
A decomposer
An omnivore
Plants always come at the beginning of a food chain, which is why they are known as producers - only plants can turn sunlight into food
6 .
In a food web, green plants are known as producers. Why is this?
Because plants are not carnivores
Because plants are the most efficient at transferring energy
Because plants create their own food from sunlight
Because plants are inefficient at transferring energy
Plants use photosynthesis to convert sunlight into food
7 .
What is an omnivore?
An omnivore eats only green plants
An omnivore is a top carnivore
An omnivore eats both plants and animals
An omnivore is a decomposer
Humans are omnivores
8 .
Which of these food chains is in the right order?
Shrimp → algae → cod → seal → polar bear
Algae → cod → shrimp → seal → polar bear
Polar bear → seal → cod → shrimp → algae
Algae → shrimp → cod → seal → polar bear
Arrows show the way in which energy is moving
9 .
Rose → aphid → ladybird. In this food chain, what is the ladybird?
The producer
A decomposer
The secondary consumer
The primary consumer
The rose is the producer, the aphid is the primary consumer and the ladybird is the secondary consumer
10 .
In a food web, secondary consumers eat the primary consumers, or herbivores. Which one of these is a secondary consumer?
Fox
Caterpillar
Rabbit
Cow
Caterpillars, rabbits and cows are all herbivores and so primary consumers
You can find more about this topic by visiting BBC Bitesize - What is a food chain?

Author:  Sheri Smith (PhD English Literature, English Teacher & Quiz Writer)

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