# Food-chain worksheet with answer key

> Build a food-chain card diagram and explain each arrow. Includes organism roles, short questions and an answer key.

Source: https://panduanhewan.org/en/learn/worksheet-food-chains/ · Updated 2 October 2026 · English · Bahasa Indonesia: https://panduanhewan.org/id/belajar/lkpd-rantai-makanan/
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## Activity 1

Use the lesson’s two rice-field routes. State the requested role, relationship or symbol meaning.

1. Rice
2. Rat eating rice
3. Snake eating the rice-eating rat
4. Eagle after snake on route A
5. Grasshopper eating rice
6. Frog eating the grasshopper on route B
7. Eagle after frog on route B
8. Decomposing bacteria and fungi
9. Seagrass → dugong
10. Rat → barn owl

## Activity 2

1. Explain arrow direction with one example.
2. Write the two lesson rice-field routes.
3. Why should decomposers not appear only after the eagle?
4. How does an organism list differ from a food web?
5. What limits a prediction about fewer rats?

## Answer key

1. Rice: Producer
2. Rat eating rice: Primary consumer
3. Snake eating the rice-eating rat: Secondary consumer
4. Eagle after snake on route A: Tertiary consumer
5. Grasshopper eating rice: Primary consumer
6. Frog eating the grasshopper on route B: Secondary consumer
7. Eagle after frog on route B: Tertiary consumer
8. Decomposing bacteria and fungi: Decomposers
9. Seagrass → dugong: The dugong eats seagrass
10. Rat → barn owl: The barn owl eats the rat

- 1. Rice → rat shows food energy moving from the rice eaten to the rat.
- 2. Rice → rat → snake → eagle; rice → grasshopper → frog → eagle. These are teaching models, not a survey of one field.
- 3. Rice and every animal can also leave remains that decompose.
- 4. A list names organisms; a web shows evidence-supported feeding links.
- 5. The model indicates possible effects on predators and food, but provides no quantities, alternative diets or certain outcomes.