Starter quiz
- An object is set sliding across a surface. The greater the friction, the ______ the distance the object will slide, before it stops.
- 'shorter' ✓
- For an experiment to be a fair test, how many things can be changed between each test?
- For a fair test, nothing can be changed between each test.
- For a fair test, only one thing can be changed between each test. ✓
- For a fair test, only two things can be changed between each test.
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- How do scientists check for mistakes in their results during the experiment?
- They always have another scientist watching the experiment too.
- They do repeat measurements. ✓
- They set up their equipment really carefully.
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- A scientist slides a mass across a desk four times, in the same way each time. The distances travelled by the mass each time were 34, 37, 55 and 35 cm. Which result is probably a mistake?
- 34 cm
- 37 cm
- 55 cm ✓
- 35 cm
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- Which of the following statements are examples of lubricants (substances added to reduce friction)?
- Oil on a bike chain ✓
- Grease in an engine ✓
- Water in a water slide ✓
- Paint on wooden floorboards
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- A scientist slides a mass across a desk four times, in the same way each time. The distances travelled by the mass each time were 54, 57, 54, and 55 cm. What should be used as the final result?
- The lowest result (54 cm).
- The highest result (57 cm).
- The most common result (54 cm).
- The mean (average) result (55 cm). ✓
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