You will learn
- Name conditions that affect growth.
- Change one thing in a fair test.
- Predict and record results.
- Explain what the results show.
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
- Water, light, warmth and air affect plant growth.
- In a fair test, change only one thing.
- Keep everything else the same.
- Record results in a table.
Words to know
a thing that can change in a test
a test where only one thing is changed
the cup where nothing is changed
what we find out
1. Discover: Two cups of beans
Naana sets up two cups of beans. One goes on a sunny windowsill, the other in a shaded corner. Both get the same water and the same soil. After a week, both have sprouted but the sunny one is taller and greener. “Light made a difference,” she says.
Think: What did Naana change? What stayed the same?
2. Understand: Fair tests for plant growth
Idea 1: What affects growth?
Plants grow best with enough water, light, warmth and air. Too little or too much of any of these can slow growth or harm a plant.
Idea 2: A fair test
In a fair test we change only one variable, such as the place or the amount of water. Everything else stays the same. A control cup shows normal growth.
Idea 3: Recording results
We measure and draw each cup on the same days, write the results in a table and compare. Then we say what the results show.
3. Worked examples
Example 1 (I show you): What is the variable?
Two cups: one in sun, one in shade.
- Place is changed.
- Water and soil same.
- Variable is light.
Answer: The variable is the amount of light.
Example 2 (We do it together): Is it fair?
One cup has more water and more light.
- Two things changed.
- Not fair.
- Change only one.
Answer: It is not a fair test.
Example 3 (You try): Explain results
Sun cup taller than shade cup.
Show the steps and answer
- Same water.
- Only light changed.
- Light helps growth.
Answer: More light gave taller plants.
Did you know?
Farmers around the world run fair tests of seeds and soils every season to find what grows best.
Why this matters
Fair tests help gardeners and farmers learn how to grow strong crops.
4. Explore: Germination fair test
Compare bean germination in two suitable places.
- Set up two cups with damp paper and a bean each.
- Put one in a warm place and one in a slightly cooler place; keep both safe.
- Give the same amount of water.
- Check and record for seven days.
Think about it: what did you notice?
What did you notice? The warmer cup sprouted sooner.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- In a fair test we change only ___ thing.
- A ___ shows normal growth.
- Plants need water, light, warmth and ___.
- We write results in a ___.
Guided practice
Question 1. Name one thing plants need.
Water, light, warmth or air.
Question 2. What is a fair test?
Changing one thing only.
Question 3. What is a control?
The cup with nothing changed.
Independent practice
Level 1: Start
- Name one thing plants need.
- What is a fair test?
- What is a control?
- Where do we write results?
- What is a variable?
Level 2: Grow
- Why keep water the same?
- What did the sun cup show?
- What if both cups change?
Level 3: Stretch
- Plan a fair test of watering.
- Draw a results table.
- Explain what the results show.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
What do farmers near you do to help crops grow?
Show a sample answer
Water, weed and plant in the rains.
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: Change one thing only.
Fix: Too much can harm plants.
8. Lesson summary and revision card
- I can name conditions that affect growth.
- I can change one thing in a fair test.
- I can predict and record results.
- I can explain what the results show.
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
- Water, light, warmth and air affect plant growth.
- In a fair test, change only one thing.
- Keep everything else the same.
- Record results in a table.
11. Next lesson
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.
- Name three conditions for growth. [3 marks]
- What is a fair test? [2 marks]
- What is a control? [1 mark]
- Plan a germination test. [3 marks]
- Explain results: sun cup taller. [2 marks]
Total: 11 marks.
Marking guide and model answers
- Any three [1 each]
- Change one thing [1]; keep rest the same [1]
- Cup with nothing changed [1]
- Two cups [1]; one variable [1]; record [1]
- Light changed [1]; light helps growth [1]
Score guide: 10 to 11 = secure. 7 to 9 = nearly there, revise the parts you missed. Under 7 = work through the lesson again with a grown-up.
Printable worksheet
- Name one thing plants need.
- What is a fair test?
- What is a control?
- Where do we write results?
- What is a variable?
- Why keep water the same?
- What did the sun cup show?
- What if both cups change?
- Plan a fair test of watering.
- Draw a results table.
Homework
Plan a fair test at home with two cups of seeds. Write what you change and what you keep the same.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. Name one thing plants need. | Water, light, warmth or air. | 1 |
| 2. What is a fair test? | Changing one thing only. | 1 |
| 3. What is a control? | The cup with nothing changed. | 1 |
| 4. Where do we write results? | In a table. | 1 |
| 5. What is a variable? | A thing that can change. | 1 |
| 6. Why keep water the same? | To be fair. | 1 |
| 7. What did the sun cup show? | Taller growth. | 1 |
| 8. What if both cups change? | It is not fair. | 1 |
| 9. Plan a fair test of watering. | Same cups; change water only. | 1 |
| 10. Draw a results table. | Day, height, notes. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Water, light, warmth or air.; 2 Changing one thing only.; 3 The cup with nothing changed.; 4 In a table.; 5 A thing that can change.. Level 2: 1 To be fair.; 2 Taller growth.; 3 It is not fair.. Level 3: 1 Same cups; change water only.; 2 Day, height, notes.; 3 Link result to the variable..
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 Name conditions that affect growth | 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 Change one thing in a fair test | 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 Predict and record results | 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 Explain what the results show | 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: “Change everything to see what happens.” Change one thing only.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Plan a fair test and say what the results show.
- 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 runs a simple fair test about seed germination. You do not need to be an expert to help.
- Help set up the cups.
- Ask, “What did we change?”
- Measure and record together.
- 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: name conditions that affect growth; change one thing in a fair test; predict and record results; explain what the results show.
Prerequisite knowledge. Grade 1 ideas: plant parts (root, stem, leaf, flower), what plants need and caring for plants.
Materials. Plastic cups, paper towels, beans, water, a ruler and record sheets. 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 two safe places away from heat. Soak beans overnight. Prepare record sheets.
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 two seedlings and ask, “Why different?”
Explanation (10 min). Teach fair test.
Guided activity (10 min). Learners plan and set up.
Independent activity (10 min). Learners record and explain.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. What did you change? What stayed the same?
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. “Change everything to see what happens.” Change one thing only.
13–15. Assessment questions, answer keys, marking scheme
Use the quiz, the 11-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. Plan a fair test and say what the results show. 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 2 Unit 2, topic 10; Next Generation Science Standards, heredity and life cycles of organisms (plant life cycles and needs); Cambridge Primary Science Stage 2, plants and their life cycles; IB Primary Years Programme, how the world works. These sources informed the lesson.