You will learn
- Define ecosystem.
- Name examples.
- Describe how parts depend on each other.
- Observe a local ecosystem.
Version 0.2 · expanded edition · built from cited public sources Content is based on the official frameworks and sources listed under Sources and standards. No official endorsement is claimed. Written in the style of common primary school assessments. No exam result is promised.
Student lesson
- An ecosystem has living and non-living parts.
- Examples are ponds, forests and farms.
- The parts depend on each other.
- Changing one part can change others.
Words to know
living things and their surroundings working together
all the living things in an ecosystem
the surroundings of a living thing
depending on each other
1. Discover: The school pond
The school pond has frogs, fish, water plants, insects, mud and sunlight. “It is a tiny world,” says Efua. “The plants give oxygen, the insects feed the frogs, and the sun gives energy.”
Think: What happens if the plants die?
2. Understand: Ecosystems
Idea 1: What is an ecosystem?
An ecosystem is a place where living things and their non-living environment (water, soil, air, sunlight) work together. The living things form a community.
Idea 2: Examples
A pond, a forest, a grassland, a farm and even a rotting log are ecosystems. They can be tiny or huge.
Idea 3: Depend on each other
Living things in an ecosystem are interdependent. Plants feed animals, animals spread seeds, and decaying matter feeds the soil.
3. Worked examples
Example 1 (I show you): Name
Pond.
- Water.
- Fish.
- Ecosystem.
Answer: A pond is an ecosystem.
Example 2 (We do it together): Parts
Sun.
- Non-living.
- Energy.
- Part.
Answer: Sunlight is a non-living part.
Example 3 (You try): Link
Plants and frogs.
Show the steps and answer
- Insects.
- Food.
- Depend.
Answer: Parts depend on each other.
Did you know?
A single rotting log can be an ecosystem for hundreds of different small animals.
Why this matters
Understanding ecosystems helps us protect nature.
4. Explore: Mini ecosystem hunt
Observe a small patch of ground.
- Mark a hoop on the ground.
- List living things.
- List non-living things.
- Draw links between them.
Think about it: what did you notice?
What did you notice? Many living things shared a small space.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- An ___ has living and non-living parts.
- The living things form a ___.
- Plants and animals ___ on each other.
- Sunlight is ___ living.
Guided practice
Question 1. What is an ecosystem?
Living things and environment.
Question 2. Name one.
Pond.
Question 3. What is a community?
Living things.
Independent practice
Level 1: Start
- What is an ecosystem?
- Name one.
- What is a community?
- Name a non-living part.
- What does interdependent mean?
Level 2: Grow
- Why do parts depend?
- Why protect ponds?
- Why is a log an ecosystem?
Level 3: Stretch
- Hunt in a hoop.
- Draw links.
- Explain an ecosystem.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
Name an ecosystem near you.
Show a sample answer
Pond.
Another one. Tell a family member one thing from this lesson. Use the words you learned.
Show a sample answer
A clear sentence that uses at least one word from Words to know.
7. Common mistakes
Fix: Many kinds.
Fix: They depend on each other.
8. Lesson summary and revision card
- I can define ecosystem.
- I can name examples.
- I can describe how parts depend on each other.
- I can observe a local ecosystem.
9. Check and master
Answer all 14 questions. You will see feedback after each one.
Your result appears here after you answer every question.
10. Key takeaways
- An ecosystem has living and non-living parts.
- Examples are ponds, forests and farms.
- The parts depend on each other.
- Changing one part can change others.
11. Next lesson
Next lesson: Living and non-living components. Keep going with the next idea in this course.
Exam practice
These questions are written in the style of common school and international primary assessments. Try them on your own, without looking back. Then check your answers in the marking guide. The marks are shown in brackets.
- Define ecosystem. [2 marks]
- Name three parts of a pond. [3 marks]
- Explain interdependence. [2 marks]
- Name two ecosystems. [2 marks]
- Safety rule? [1 mark]
Total: 10 marks.
Marking guide and model answers
- Living things [1]; environment [1]
- 1 each
- Depend [1]; example [1]
- 1 each
- Any [1]
Score guide: 9 to 10 = secure. 6 to 8 = nearly there, revise the parts you missed. Under 6 = work through the lesson again with a grown-up.
Printable worksheet
- What is an ecosystem?
- Name one.
- What is a community?
- Name a non-living part.
- What does interdependent mean?
- Why do parts depend?
- Why protect ponds?
- Why is a log an ecosystem?
- Hunt in a hoop.
- Draw links.
Homework
Draw a mini ecosystem near your home and label the living and non-living parts.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. What is an ecosystem? | Living things and environment. | 1 |
| 2. Name one. | Pond. | 1 |
| 3. What is a community? | Living things. | 1 |
| 4. Name a non-living part. | Water. | 1 |
| 5. What does interdependent mean? | Depend on each other. | 1 |
| 6. Why do parts depend? | Food and shelter. | 1 |
| 7. Why protect ponds? | Many species. | 1 |
| 8. Why is a log an ecosystem? | Living things there. | 1 |
| 9. Hunt in a hoop. | Table. | 1 |
| 10. Draw links. | Diagram. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Living things and environment.; 2 Pond.; 3 Living things.; 4 Water.; 5 Depend on each other.. Level 2: 1 Food and shelter.; 2 Many species.; 3 Living things there.. Level 3: 1 Table.; 2 Diagram.; 3 Paragraph..
Quiz answers: 1 B, 2 C, 3 A, 4 B, 5 C, 6 A, 7 B, 8 C, 9 A, 10 B, 11 C, 12 A, Challenge 1 B, Challenge 2 C.
Mastery and remediation
| Objective | Bronze (Developing) | Silver (Proficient) | Gold (Advanced) |
|---|---|---|---|
| O1 Define ecosystem | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O2 Name examples | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O3 Describe how parts depend on each other | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O4 Observe a local ecosystem | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
Courseversity badge thresholds (overall quiz score): Gold = 90–100%; Silver = 80–89.9%; Bronze = 70–79.9%. A badge is never a full record of progress.
If a learner struggles
- Find the misconception: “Ecosystems are only forests.” Many kinds.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Define ecosystem and describe how parts depend on each other.
- Guided practice: work through one example together and let the learner try the next one.
- Reassess: use the quiz again or the worksheet.
- Move on when the learner shows Silver-level evidence independently.
For parents and guardians
In this lesson your child learns about ecosystems. You do not need to be an expert to help.
- Explore a garden patch together.
- Ask, “What lives here?”
- Wash hands.
- Ask “how do you know?” after each answer, and listen.
- Praise effort, not only right answers. Mistakes are how we learn.
- Ten to fifteen minutes a day is better than one long session.
Teacher package
1–5. Objectives, prerequisites, materials, preparation, duration
Lesson objectives. Learners will: define ecosystem; name examples; describe how parts depend on each other; observe a local ecosystem.
Prerequisite knowledge. Grade 2 habitat ideas: animals and plants live in habitats, need food, water and shelter, and depend on each other.
Materials. Hoops or string, paper, pencils. Low-resource options: use chalk or charcoal on a board or wall, drawings in the sand, and objects from the classroom instead of printed materials.
Preparation. Choose a safe patch.
Suggested duration. 45–60 minutes. It can be split into two shorter sessions.
6–9. Teaching procedure, explanation notes, guided and independent activities
Introduction (5 min). Show a pond picture and ask, “What lives here?”
Explanation (10 min). Teach ecosystems.
Guided activity (10 min). Learners hunt.
Independent activity (10 min). Learners draw.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. What is living? What is non-living? How are they linked?
Teacher explanation notes. Start with real objects and safe, hands-on observation. Then talk about what was seen, then draw and write. Always say “how do you know?”. Keep to the safety notes, and use local, safe materials.
10–12. Differentiation, formative assessment, common misconceptions
Support. Use real objects and pictures, short sentences and a partner. Let learners point, show or draw instead of writing. Extension. Ask learners to find a new example at home and explain how they know.
Formative assessment. Listen to learners read and explain, ask “how do you know?”, and check the independent work.
Misconceptions. “Ecosystems are only forests.” Many kinds.
13–15. Assessment questions, answer keys, marking scheme
Use the quiz, the 10-mark exam practice and the worksheet on this page. All answers and marking guides are in the answer sections above. Re-check every answer before use.
16–19. Remediation, enrichment, homework, teacher reflection
Remediation. Define ecosystem and describe how parts depend on each other. Enrichment. Look for one new example near your home or school, draw it and explain it to someone. Homework. See above.
Teacher reflection. After teaching, record: which ideas learners understood; which misconceptions occurred; which activities worked; which learners need more practice; and what to improve next time.
Sources and standards
This lesson is based on the sources below, and no official endorsement is claimed. Reference starting points: Next Generation Science Standards, Cambridge Primary Science and the IB Primary Years Programme. Where a standard code is named, it points to the official framework.
Research used to shape this lesson. Courseversity Science curriculum, Grade 3 Unit 9, topic 1; Next Generation Science Standards, interdependent relationships in ecosystems; Cambridge Primary Science Stage 3, living things and their environment; IB Primary Years Programme, sharing the planet. These sources informed the lesson.