Ecosystems — Grade 4 Science Übungsblatt
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.
Geübte Fähigkeiten
- Identifying producers, consumers, and decomposers
- Building and reading food chains
- Understanding energy flow
- Describing habitat roles
Übungsblatt: Ecosystems
Anleitung: Löse jede Aufgabe sorgfältig. Zeige deine Arbeit klar. Schreibe deine endgültige Antwort in das vorgesehene Feld oder wie angewiesen auf ein separates Blatt.
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1.What is an ecosystem?
Ecosystems — Übungsblatt (Fortsetzung)
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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 — Übungsblatt (Fortsetzung)
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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 — Übungsblatt (Fortsetzung)
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5.Draw a simple food chain with three parts. Label each part.
Ecosystems — Übungsblatt (Fortsetzung)
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6.Which of the following is a producer in an ecosystem?
- A. Fox
- B. Grass
- C. Mushroom
- D. Hawk
Ecosystems — Übungsblatt (Fortsetzung)
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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 — Übungsblatt (Fortsetzung)
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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?
Lösungsschlüssel
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1.
Endgültige Antwort: An ecosystem is a community of living things interacting with each other and with their nonliving environment.
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2.
Endgültige Antwort: c) Tree
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3.
Endgültige Antwort: Accept any two: sunlight, water, soil, air, rocks, temperature.
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4.
Endgültige Antwort: herbivore
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5.
Endgültige Antwort: Example: Sun Grass Rabbit. (Accept any correct three-part chain with labels.)
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6.
Endgültige Antwort: b) Grass
Lösungsschlüssel (Fortsetzung)
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7.
Endgültige Antwort: Plants may wilt or die, and animals may move away or die from lack of water.
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8.
Endgültige Antwort: decomposer
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9.
Endgültige Antwort: herbivore
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10.
Endgültige Antwort: Decomposers break down dead plants and animals, returning nutrients to the soil so new plants can grow.
Häufige Fehler, die es zu vermeiden gilt
- 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
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Zuletzt aktualisiert: 2026