Food Web and Food Chain worksheet - Free Printable

Let's solve the Food Webs and Food Chains Worksheet step by step, explaining each answer clearly.

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Question 1: Look at this food chain

The food chain shown is:

Lettuce → Greenfly → Ladybird → Thrush → Cat

#### A. What does the arrow mean in a food chain?

✔ Answer: The arrow shows the direction of energy flow — it indicates "is eaten by" or "energy transfer from one organism to another."

> Explanation: In a food chain, arrows point from the organism being eaten to the one that eats it. So, "lettuce → greenfly" means the greenfly eats the lettuce.

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#### B. Name the producer in the food chain

✔ Answer: Lettuce

> Explanation: A producer is an organism that makes its own food using sunlight (via photosynthesis). Lettuce is a plant, so it is a producer.

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#### C. Name an herbivore in the food chain

✔ Answer: Greenfly

> Explanation: An herbivore eats only plants. The greenfly feeds on lettuce (a plant), so it is an herbivore.

> ✔ Other possible answers: *None* — only greenfly is directly eating a plant here. Ladybird eats greenfly (so it’s not an herbivore).

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#### D. Name the secondary consumer in the food chain

✔ Answer: Ladybird

> Explanation:
- Primary consumer: Greenfly (eats producer)
- Secondary consumer: Eats primary consumer → Ladybird eats greenfly
- So, ladybird is the secondary consumer.

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#### E. Name the tertiary consumer in the food chain

✔ Answer: Thrush

> Explanation:
- Tertiary consumers eat secondary consumers.
- Thrush eats ladybird → so thrush is the tertiary consumer.
- Cat is the quaternary consumer (top predator), but the question asks for tertiary.

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✔ Summary of Question 1:

| Part | Answer |
|------|--------|
| A | The arrow means "is eaten by" or shows energy flow. |
| B | Lettuce |
| C | Greenfly |
| D | Ladybird |
| E | Thrush |

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Question 2: Look at these food chains (Food Web in a Forest)

This is a food web, showing multiple interconnected food chains.

We are asked to analyze relationships between organisms.

Let’s go through the key parts:

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#### Key Organisms and Roles:

- Green Plant → Producer (makes its own food via photosynthesis)
- Goat, Rabbit, Mouse → Herbivores (eat plants)
- Jackal, Wild Cat, Owl, Snake → Carnivores (eat animals)
- Lion, Kite → Top predators

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Now let’s identify feeding relationships:

1. Green Plant → Goat → Jackal → Lion
2. Green Plant → Rabbit → Jackal → Lion
3. Green Plant → Rabbit → Wild Cat → Lion
4. Green Plant → Mouse → Owl
5. Green Plant → Mouse → Snake → Kite
6. Green Plant → Rabbit → Owl
7. Green Plant → Mouse → Wild Cat → Lion
8. Green Plant → Rabbit → Snake → Kite

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Now, we can answer any implied questions (since no specific questions are listed under Q2, but usually students are asked things like):

But since the worksheet doesn’t list specific questions under Q2, I’ll provide common ones and their answers based on the food web:

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🔍 Common Questions & Answers (Based on the Food Web)

#### Q: Name two producers in this food web.

✔ Answer: Green Plant (and possibly other plants, though only one is labeled)

> Note: Only "Green Plant" is labeled as producer.

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#### Q: Name three herbivores.

✔ Answer: Goat, Rabbit, Mouse

> They all eat the green plant.

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#### Q: Name a primary consumer.

✔ Answer: Rabbit (or Goat or Mouse)

> Primary consumers eat producers.

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#### Q: Name a secondary consumer.

✔ Answer: Jackal, Owl, Wild Cat, Snake

> These eat primary consumers (like rabbit, mouse).

> Example: Jackal eats rabbit → secondary consumer.

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#### Q: Name a tertiary consumer.

✔ Answer: Lion, Kite, Owl (in some cases)

> Example: Lion eats jackal (secondary consumer) → lion is tertiary.

> Kite eats snake → snake is secondary → kite is tertiary.

> Owl eats mouse → primary → owl is secondary; if owl eats snake, then tertiary.

> But in this web, owl eats rabbit and mouse → so secondary consumer.

> Snake eats mouse → secondary
> Kite eats snake → tertiary
> Lion eats jackal/wild cat → tertiary

So, kite and lion are tertiary consumers.

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#### Q: Which animal has the most food sources?

✔ Answer: Lion

> It eats jackal, wild cat, and possibly others.

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#### Q: Which animal is at the top of the food web?

✔ Answer: Lion and Kite

> Both have no predators shown — they are apex predators.

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#### Q: What would happen if the green plant disappeared?

✔ Answer: The entire food web would collapse because all animals depend on the plant directly or indirectly.

> Without producers, herbivores die → then carnivores starve.

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✔ Final Summary for Question 2 (Food Web)

- Producer: Green Plant
- Herbivores: Goat, Rabbit, Mouse
- Primary Consumers: Goat, Rabbit, Mouse
- Secondary Consumers: Jackal, Wild Cat, Owl, Snake
- Tertiary Consumers: Lion, Kite
- Top Predators: Lion, Kite
- Energy Flow: From plant → herbivores → carnivores → top predators

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📌 Conclusion

This worksheet helps understand:
- How energy flows through ecosystems
- Roles of producers, consumers (primary, secondary, tertiary)
- Difference between food chains and food webs
- Interdependence in ecosystems

Let me know if you'd like this turned into a printable answer sheet or want to add more questions!