Ecosystems — Grade 4 Science 練習ワークシート
An ecosystem is a community of living organisms interacting with each other and their nonliving environment — sunlight, water, soil, and air.
Producers (plants and algae) make their own food through photosynthesis. Consumers eat other organisms. Decomposers break down dead matter and return nutrients to the soil.
Food chains show energy flow from one organism to the next. Food webs show overlapping chains in a community. Energy decreases at each level — only about 10% transfers to the next trophic level.
練習するスキル
- Identifying producers, consumers, and decomposers
- Building and reading food chains
- Understanding energy flow
- Describing habitat roles
練習ワークシート:Ecosystems
指示: 各問題を丁寧に解きましょう。途中式もはっきりと書きましょう。最終的な答えは、指定された場所または指示に従って別の用紙に書いてください。
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1.What is an ecosystem?
Ecosystems — 練習ワークシート(続き)
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2.Which of the following is a living part of an ecosystem?
- A. Sunlight
- B. Water
- C. Tree
- D. Soil
Ecosystems — 練習ワークシート(続き)
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3.Name two nonliving things in an ecosystem.
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4.A is an animal that eats only plants.
Ecosystems — 練習ワークシート(続き)
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5.Draw a simple food chain with three parts. Label each part.
Ecosystems — 練習ワークシート(続き)
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6.Which of the following is a producer in an ecosystem?
- A. Fox
- B. Grass
- C. Mushroom
- D. Hawk
Ecosystems — 練習ワークシート(続き)
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7.What happens to the plants and animals in an ecosystem when there is not enough water?
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8.A is a living thing that breaks down dead plants and animals.
Ecosystems — 練習ワークシート(続き)
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9.Circle the correct answer: A deer is a (herbivore / carnivore / omnivore).
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10.Why are decomposers important in an ecosystem?
解答集
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1.
最終回答: An ecosystem is a community of living things interacting with each other and with their nonliving environment.
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2.
最終回答: c) Tree
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3.
最終回答: Accept any two: sunlight, water, soil, air, rocks, temperature.
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4.
最終回答: herbivore
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5.
最終回答: Example: Sun Grass Rabbit. (Accept any correct three-part chain with labels.)
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6.
最終回答: b) Grass
解答集(続き)
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7.
最終回答: Plants may wilt or die, and animals may move away or die from lack of water.
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8.
最終回答: decomposer
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9.
最終回答: herbivore
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10.
最終回答: Decomposers break down dead plants and animals, returning nutrients to the soil so new plants can grow.
避けるべきよくある間違い
- Calling all animals producers
- Reversing arrow direction in food chains (arrows point to who gets eaten)
- Forgetting decomposers in food webs
- Confusing habitat with ecosystem
自分だけのワークシートを作成
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最終更新:2026