You will learn
- Say what friction is.
- Test different surfaces.
- Explain how friction helps and hinders.
- Describe ways to increase or decrease friction.
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
- Friction is a force that slows things.
- Rough surfaces have more friction.
- Smooth surfaces have less friction.
- Friction helps us grip and stop.
Words to know
a force between two surfaces rubbing
even and slippery
bumpy with more grip
how well something holds a surface
1. Discover: Wet floor
After the rains, the school path is slippery. Yaw slides when he walks quickly. “The wet mud has little friction,” says his teacher. “Our shoes cannot grip.” The class throws sand on the path and walks safely.
Think: Why did the sand help?
2. Understand: Friction
Idea 1: What is friction?
Friction is a force that acts when two surfaces rub together. It slows moving objects down and can make them warm.
Idea 2: Rough and smooth
Rough surfaces have more friction. Smooth surfaces have less. A car slides further on ice than on a rough road.
Idea 3: Helpful and unhelpful
Friction helps shoes grip and brakes stop. Too much friction wears out parts, so oil is used to reduce it in machines.
3. Worked examples
Example 1 (I show you): More friction?
Sandpaper or glass.
- Sandpaper is rough.
- More friction.
- Slows more.
Answer: Sandpaper has more friction.
Example 2 (We do it together): Helps
Shoes grip.
- Friction holds.
- No sliding.
- Safe.
Answer: Friction helps shoes grip.
Example 3 (You try): Reduce
Oil on a hinge.
Show the steps and answer
- Oil smooths.
- Less friction.
- Moves easily.
Answer: Oil reduces friction.
Did you know?
Rubbing your hands together makes them warm because of friction.
Why this matters
Friction helps us walk, stop and hold things.
4. Explore: Surface slide
Slide a block down a ramp covered with different surfaces.
- Cover a ramp with cloth, paper, sandpaper.
- Release a small block.
- Measure how far it slides.
- Compare.
Think about it: what did you notice?
What did you notice? The rough surface stopped it sooner.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- Friction is a ___ between surfaces.
- Rough surfaces have ___ friction.
- Oil ___ friction.
- Shoes use friction to ___.
Guided practice
Question 1. What is friction?
A force when surfaces rub.
Question 2. Which has more friction, rough or smooth?
Rough.
Question 3. What helps shoes grip?
Friction.
Independent practice
Level 1: Start
- What is friction?
- Which has more friction, rough or smooth?
- What helps shoes grip?
- What reduces friction?
- What do brakes use?
Level 2: Grow
- Why is ice slippery?
- Why throw sand on mud?
- Why do hands get warm?
Level 3: Stretch
- Test three surfaces.
- Explain results.
- Design a non-slip mat.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
Where is it slippery near you?
Show a sample answer
Wet mud or tiles.
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: It also helps us grip.
Fix: Rough has more.
8. Lesson summary and revision card
- I can say what friction is.
- I can test different surfaces.
- I can explain how friction helps and hinders.
- I can describe ways to increase or decrease friction.
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
- Friction is a force that slows things.
- Rough surfaces have more friction.
- Smooth surfaces have less friction.
- Friction helps us grip and stop.
11. Next lesson
Next lesson: Sloping surfaces. 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.
- What is friction? [2 marks]
- Rough or smooth: which has more? [1 mark]
- Give a helpful and unhelpful friction. [2 marks]
- How do we reduce friction? [2 marks]
- Describe a surface test. [3 marks]
Total: 10 marks.
Marking guide and model answers
- Force [1]; surfaces rubbing [1]
- Rough [1]
- Helpful [1]; unhelpful [1]
- Oil [1]; smooth [1]
- Ramp [1]; surfaces [1]; measure [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 friction?
- Which has more friction, rough or smooth?
- What helps shoes grip?
- What reduces friction?
- What do brakes use?
- Why is ice slippery?
- Why throw sand on mud?
- Why do hands get warm?
- Test three surfaces.
- Explain results.
Homework
Slide a small toy over three surfaces at home. Rank them by friction.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. What is friction? | A force when surfaces rub. | 1 |
| 2. Which has more friction, rough or smooth? | Rough. | 1 |
| 3. What helps shoes grip? | Friction. | 1 |
| 4. What reduces friction? | Oil. | 1 |
| 5. What do brakes use? | Friction. | 1 |
| 6. Why is ice slippery? | Little friction. | 1 |
| 7. Why throw sand on mud? | More grip. | 1 |
| 8. Why do hands get warm? | Friction. | 1 |
| 9. Test three surfaces. | Table. | 1 |
| 10. Explain results. | Link to friction. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 A force when surfaces rub.; 2 Rough.; 3 Friction.; 4 Oil.; 5 Friction.. Level 2: 1 Little friction.; 2 More grip.; 3 Friction.. Level 3: 1 Table.; 2 Link to friction.; 3 Rough bottom..
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 Say what friction is | 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 Test different surfaces | 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 how friction helps and hinders | 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 Describe ways to increase or decrease friction | 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: “Friction only slows things.” It also helps us grip.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Explain friction and test surfaces.
- 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 tests friction on different surfaces. You do not need to be an expert to help.
- Rub hands together.
- Ask, “Why is it warm?”
- Slide a toy on different floors.
- 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: say what friction is; test different surfaces; explain how friction helps and hinders; describe ways to increase or decrease friction.
Prerequisite knowledge. Grade 1 ideas: pushing and pulling, things that move and making things move faster or slower.
Materials. Ramp, cloth, paper, sandpaper, small blocks and rulers. 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. Prepare ramps and surfaces. Prepare tables.
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). Rub hands and ask, “Why warm?”
Explanation (10 min). Teach friction.
Guided activity (10 min). Learners test surfaces.
Independent activity (10 min). Learners rank.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. Which has more friction? How can you tell?
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. “Friction only slows things.” It also helps us grip.
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. Explain friction and test surfaces. 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 6, topic 5; Next Generation Science Standards, motion and stability: forces and interactions (K-2-ETS and 3-PS2 foundations); Cambridge Primary Science Stage 2, forces and movement; IB Primary Years Programme, how the world works. These sources informed the lesson.