Friction: plan | Science | Quizalize & Oak National Academy

Starter quiz

Does an object experience more friction when moving across a rough surface or a smooth surface?
- a rough surface ✓
- a smooth surface
What can forces do to an object?
- Change its shape. ✓
- Start it moving. ✓
- Change its colour.
- Change its direction. ✓
- Make it heavier.
Which of these describes a surface?
- The space around an object.
- The top or outside layer of an object or material. ✓
- The area beneath an object.
- The inside of an object.
Which of these words describes how an object can move or be moved by a force?
- grab ✓
- shove ✓
- push
- pull
What type of meter do you measure the size of forces?
- 'force' ✓
Magnets can pull certain objects towards them from a distance. What type of force is magnetism?
- contact
- non-contact ✓

Friction is the force between two objects, or ______ that are moving, or trying to move, across each other.
- 'surfaces' ✓
What is a variable in an experiment?
- Something that is changed, measured or controlled in an experiment. ✓
- A tool used to collect data.
- A measurement of the final result of the experiment.
If the enquiry question is, "Does the type of sports shoe affect the amount of friction created between the shoe and the floor?", which variable should you change?
- the floor surface
- the equipment used to measure the size of the force
- the type of sports shoe ✓
In an investigation we should control...
- all but one variable. ✓
- one variable.
- all variables.
- no variables.
Friction always works in the ______ direction to the movement of an object.
- 'opposite' ✓
Why is it important to change only one variable in a scientific investigation?
- To make the experiment quicker and easier to do.
- To make the experiment more complicated and harder to analyse.
- To make sure we know which variable caused the change. ✓

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Friction is the force between two surfaces that are moving, or trying to move, across each other.
Friction always acts in the opposite direction to the movement of an object.
Only changing one variable ensures that no other factor affects the test results.

Friction is always unhelpful.

Examples given of positive uses of friction for braking and turning.

Surface - The surface is the top or outside layer of an object or material.
Force - A force is a push or a pull. Forces can make objects move, change speed, change direction or change shape.
Friction - Friction is a force that acts between surfaces.
Variable - A variable is something that can be changed, measured or kept the same in an investigation.