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Food Web

A food web is a network of many interconnected food chains in an ecosystem.

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Student-friendly explanation

Most organisms do not depend on only one food source. A food web shows several feeding links together, so it reflects nature more realistically than a single chain. If one organism becomes fewer in number, other feeding paths may still support the ecosystem for some time.

How to write this in exams

  1. 1

    Start with the exact idea

    A food web is a network of many interconnected food chains in an ecosystem.

  2. 2

    Then show how to use it

    1. List possible food chains. 2. Find common organisms. 3. Connect the chains. 4. Show all feeding links in one network.

  3. 3

    Add one concrete example

    In a garden, a grasshopper may be eaten by a frog or a bird, while a rabbit may eat grass and also be prey for a fox. These links form a food web.

  4. 4

    Avoid this incomplete answer

    A common wrong answer is to call any long food chain a food web. This is wrong because a web must show branching and linking paths.

Definition

A food web is a network of many interconnected food chains in an ecosystem.

Example

In a garden, a grasshopper may be eaten by a frog or a bird, while a rabbit may eat grass and also be prey for a fox. These links form a food web.

Rule to remember

Food web = many food chains joined together by common organisms and feeding links.

Memory hook

A chain is one line, but a web has many crossing lines.

Examples and method

Worked example

If a bird can eat both insects and seeds, it is connected to two different food chains. Such multiple links make the food web stronger than a single chain.

Method to apply

1. List possible food chains. 2. Find common organisms. 3. Connect the chains. 4. Show all feeding links in one network.

Diagram support

Draw several arrows crossing between plants, insects, birds, frogs, and snakes to show many feeding paths.

How CBSE asks it

Explain a food web, compare it with a food chain, or interpret a diagram with many feeding arrows.

Avoid common mistakes

Common confusion

Students often think a food web is just a longer food chain. In reality, it is a network with many connections.

Common wrong answer

A common wrong answer is to call any long food chain a food web. This is wrong because a web must show branching and linking paths.

Exam tip

Use the word network or interconnected food chains when explaining a food web.

Quick check

Why is a food web more stable than a single food chain?

A food web is more stable because organisms have more than one feeding path. If one food source becomes scarce, another link may still support the organisms in the ecosystem.

Answer writing and exam use

1-mark answer

A food web is a network of many interconnected food chains in an ecosystem.

2-mark answer

A food web is a network of many interconnected food chains in an ecosystem. Food web = many food chains joined together by common organisms and feeding links. In a garden, a grasshopper may be eaten by a frog or a bird, while a rabbit may eat grass and also be prey for a fox. These links form a food web.

3-mark answer

Most organisms do not depend on only one food source. A food web shows several feeding links together, so it reflects nature more realistically than a single chain. If one organism becomes fewer in number, other feeding paths may still support the ecosystem for some time. Food web = many food chains joined together by common organisms and feeding links. If a bird can eat both insects and seeds, it is connected to two different food chains. Such multiple links make the food web stronger than a single chain. Explain a food web, compare it with a food chain, or interpret a diagram with many feeding arrows. A common wrong answer is to call any long food chain a food web. This is wrong because a web must show branching and linking paths.
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