You will learn
- Name separation methods.
- Choose a method.
- Explain why methods work.
- Plan a separation.
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
- Choose a method that uses a difference in properties.
- Filtering separates insoluble solids from liquids.
- Evaporation recovers dissolved solids.
- Magnets separate magnetic materials.
Words to know
separating solid from liquid with filter paper
removing liquid as vapour to leave a solute
pouring off a liquid from a settled solid
evaporating then condensing to separate liquids
1. Discover: The cleaning puzzle
Ngozi has a mix of sand, salt and iron filings. “I can use a magnet for the iron. Then add water to dissolve the salt, filter out the sand, and let the water evaporate to get the salt,” she says. Each step uses a different property.
Think: Why must she use the magnet first?
2. Understand: Separating
Idea 1: Physical methods
Sieving uses size; magnets use magnetism; filtration separates an insoluble solid from a liquid; decanting pours off liquid; evaporation leaves dissolved solids behind.
Idea 2: Distillation
Distillation heats a mixture, then cools the vapour to give back a liquid. It separates liquids with different boiling points and makes drinking water from seawater. Learners observe it from demonstrations or videos only.
Idea 3: Choosing
Ask: What differs between the parts, size, magnetism, solubility or boiling point? Pick the method that uses that difference.
3. Worked examples
Example 1 (I show you): Match
Method.
- Sieve.
- Filter.
- Evaporate.
Answer: Method to mixture.
Example 2 (We do it together): Plan
Three-part mix.
- Magnet.
- Dissolve.
- Filter, evaporate.
Answer: Ordered steps.
Example 3 (You try): Explain
Why works.
Show the steps and answer
- Size.
- Solubility.
- Magnetism.
Answer: Use a difference.
Did you know?
Many countries make drinking water from seawater using distillation or similar methods.
Why this matters
Separation is used in water treatment, mining, recycling and medicine.
4. Explore: Separate the mix
Separate sand, salt and iron filings (or paper clip pieces) using a magnet, water, filter paper and a saucer left on a sunny windowsill to evaporate.
- Use the magnet.
- Dissolve the salt.
- Filter the sand.
- Leave the water to evaporate.
Think about it: what did you notice?
What did you notice? Each part was recovered with a different method.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- ___ separates solid from liquid with filter paper.
- ___ removes liquid and leaves a solute.
- ___ is pouring off a liquid.
- ___ is evaporating then condensing.
Guided practice
Question 1. What is filtration?
Solid from liquid.
Question 2. What does evaporation do?
Leaves solute.
Question 3. What is decanting?
Pour off.
Independent practice
Level 1: Start
- What is filtration?
- What does evaporation do?
- What is decanting?
- What is distillation?
- What does a magnet separate?
Level 2: Grow
- Why magnet first?
- Why filter?
- Why evaporate?
Level 3: Stretch
- Plan.
- Do it.
- Explain.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
Plan how to separate sand, salt and iron filings.
Show a sample answer
Give reasons.
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: Salt dissolves.
Fix: Not all.
8. Lesson summary and revision card
- I can name separation methods.
- I can choose a method.
- I can explain why methods work.
- I can plan a separation.
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
- Choose a method that uses a difference in properties.
- Filtering separates insoluble solids from liquids.
- Evaporation recovers dissolved solids.
- Magnets separate magnetic materials.
11. Next lesson
Next lesson: Physical and chemical changes introduction. 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 filtration and evaporation. [2 marks]
- Plan a three-step separation. [4 marks]
- Explain why methods work. [2 marks]
- Safety rule. [2 marks]
Total: 10 marks.
Marking guide and model answers
- 1 each
- Magnet [1]; dissolve [1]; filter [1]; evaporate [1]
- Use difference [1]; example [1]
- Any [1]; reason [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 filtration?
- What does evaporation do?
- What is decanting?
- What is distillation?
- What does a magnet separate?
- Why magnet first?
- Why filter?
- Why evaporate?
- Plan.
- Do it.
Homework
Design a way to separate rice and small stones.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. What is filtration? | Solid from liquid. | 1 |
| 2. What does evaporation do? | Leaves solute. | 1 |
| 3. What is decanting? | Pour off. | 1 |
| 4. What is distillation? | Evaporate and condense. | 1 |
| 5. What does a magnet separate? | Magnetic items. | 1 |
| 6. Why magnet first? | Easy. | 1 |
| 7. Why filter? | Sand does not dissolve. | 1 |
| 8. Why evaporate? | Salt remains. | 1 |
| 9. Plan. | Flow chart. | 1 |
| 10. Do it. | Notes. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Solid from liquid.; 2 Leaves solute.; 3 Pour off.; 4 Evaporate and condense.; 5 Magnetic items.. Level 2: 1 Easy.; 2 Sand does not dissolve.; 3 Salt remains.. Level 3: 1 Flow chart.; 2 Notes.; 3 Sentence..
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 separation methods | 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 Choose a method | 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 Explain why methods work | 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 Plan a separation | 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: “Filtering separates salt from water.” Salt dissolves.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Choose separation methods.
- 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 separates mixtures. You do not need to be an expert to help.
- Separate rice from stones.
- Ask “What is different?”
- Mind magnets.
- 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 separation methods; choose a method; explain why methods work; plan a separation.
Prerequisite knowledge. Grade 5 ideas: states of matter, changes of state, mixtures and dissolving.
Materials. Magnet, filter paper, funnel, saucer, sand, salt, iron filings. 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. Mix samples.
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 mixed pile and ask, “How do we get each part back?”
Explanation (10 min). Teach separation.
Guided activity (10 min). Learners plan.
Independent activity (10 min). Learners separate.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. What differs? Which method?
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. “Filtering separates salt from water.” Salt dissolves.
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. Choose separation methods. 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 6 Unit 5, topic 9; Next Generation Science Standards, structure and properties of matter; Cambridge Lower Secondary Science, chemistry; IB Primary Years Programme, how the world works. These sources informed the lesson.