Learning objective

Calculate the speed of sound in air by measuring distance and time.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

Cambridge IGCSE Combined ScienceWavesCore contentPractical objective

Study support

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Quick explanation

This point belongs to Sound, especially Sound outcomes.
You need to be able to calculate the speed of sound in air by measuring distance and time.
The key ideas to know are Determine.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Determine

Why it matters

This objective helps connect Sound outcomes to exam-style questions, flashcards, and revision notes for Sound.

Revision tools

Flashcards10 linked cards

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Practice Questions7 linked questions

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Paper 6Alternative to PracticalPractical1 marks

Method

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

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

a
Identify Identify the independent variable in this experiment.
Your answer
Aim for approximately 1 distinct marking point.
[1]

Revision notestopic notes

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