Starter quiz
- What is a surface?
- The middle layer of something.
- The inside of something.
- The outside layer of something. ✓
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- Which of the following statements are true about surfaces?
- They can be natural or made by people. ✓
- They are 2-D (2-dimensional).
- They are only 3-D (3-dimensional).
- They can be 2-D (2-dimensional) or 3-D (3-dimensional). ✓
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- Starting with the smoothest, order these surfaces from smoothest to roughest.
- 1⇔polished ceramic tiles
- 2⇔potato skin
- 3⇔sandpaper
- You should only ______ one thing in a comparative test investigation.
- 'change' ✓
- Match the enquiry type to the correct example.
- Comparative test investigation⇔comparing which torch produces the brightest light ✓
- Identifying and classifying⇔sorting toys into those made of wood and plastic ✓
- Which of these parts of an investigation explain what the results show or mean?
- the question
- the list of equipment
- the conclusion ✓
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Exit quiz
Moving objects slow down or travel less far due to ______ forces.- 'friction' ✓
- Friction forces act between the ______ of objects.
- 'surfaces' ✓
- Starting with polished ceramic tile, order these objects from the surface which creates the weakest friction forces to the surface that creates the greatest friction forces.
- 1⇔polished ceramic tile
- 2⇔metal tray
- 3⇔wooden table top
- 4⇔wool carpet
If a ball rolls over two different surfaces, it will move more slowly on the surface which creates the ______ friction force.- 'greatest' ✓
- What would you find in a conclusion?
- a record of observations
- a prediction
- an explanation of results ✓
- a plan for an investigation
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Which is the correct conclusion from this enquiry question and set of results?- The results show that taller children have longer arms.
- The results show that taller children have shorter arms.
- The results do not show a clear pattern between height and arm length. ✓
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Worksheet
Presentation
Video
Lesson Details
Key learning points
- Objects move differently over different surfaces.
- Scientists can carry out comparative test investigations to compare different surfaces.
- Friction forces slow down moving objects.
- A rough surface will create a greater friction force against a moving object than a smooth surface.
- In a conclusion, scientists explain what the results show or mean.
Common misconception
Friction doesn’t have a direction; a force is needed to keep an object moving at a constant speed.
Provide examples, with images, to demonstrate the effects of friction on moving objects.
Keywords
Surface - The surface is the top or outside layer of something.
Friction forces - Friction forces are forces which act between the surfaces of objects.
Rough - Rough surfaces are uneven or bumpy.
Smooth - Smooth surfaces are even and not bumpy.
Conclusion - In a conclusion, scientists explain what the results show or mean.
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