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Cambridge IGCSE Combined Science practice

Paper 6 structured question: Sound

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Sound

Exam-style question

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Paper 6Alternative to PracticalPractical1 marks

Measuring the speed of sound in air.

Method

Method for Measuring Speed of Sound

In this experiment, you will measure the time it takes for a sound to travel a known distance in air.

StepAction
1Set up a sound source and a distance measuring device.
2Measure a distance of 100 meters.
3Use a stopwatch to time how long it takes for the sound to reach the measuring device.
4Record the time taken.
  1. a

    Identify Identify the independent variable in this experiment.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 6 structured question: Sound

Paper 6Alternative to PracticalPractical2 marks

Results Table

Results of Sound Speed Experiment

The table below shows the distance and time recorded during the experiment.

Distance (m)Time (s)Speed (m/s)
1000.3
2000.6
3000.9
  1. a

    Calculate Calculate the speed of sound for the distance of 100 meters.

    Aim for approximately 2 distinct marking points.

    [2]