Science at key stage 3 (Year 9)
Unit 9K: Speeding up
Section 3: c. How fast is it moving?
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Objectives |
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- to compare and evaluate different ways of making measurements
- that measurements for different purposes may not be equally precise
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Activities |
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Outcomes |
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Children: |
- Ask pupils to describe how times are determined in school athletics activities, and to compare this with the light gate they have just used and with the electronic equipment used in major athletics events. It would be useful to watch a video of a major athletics event and to describe how the system works. Show pupils a sequence of world records for the 100m and ask them to explain why these values need to be more precise than school athletics records.
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- suggest reasons,
eg reaction time, why hand-held timers may be less accurate than electronically triggered timers
- give reasons why some specific measurements need to be more precise than others
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Points to note |
- An alternative technique is to use a digital video camera to record the movement of the car.
- Extension: pupils could measure the speed of sound in air using a suitable method.
- Extension: pupils could be asked to find out how the speed of the tennis ball during a service, or the maximum speed of a racing car during a lap, is determined.
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This unit is divided into sections. Each section contains a sequence of
activities with related objectives and outcomes. You can view this unit by
moving through the sections or print/download the whole unit.
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