Sound Worksheet - GCSE - Intermediate

Sound worksheet for Key Stage 4 / GCSE (Ages 14-16). Intermediate level science practice, aligned to the UK National Curriculum. Print-ready with answer key included.

Science•Key Stage 4 / GCSE (Ages 14-16)•Soundintermediate

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Exploring the Science of Sound

Key Stage 4 / GCSE (Ages 14-16) - Intermediate Level

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Instructions: This worksheet delves into the fascinating world of sound. You'll explore how sound waves work, their properties, and applications. Answer the questions carefully, using the information provided and your knowledge of physics.

Understanding Sound Waves

Read the following statements about sound waves and determine whether they are true or false. Provide a brief explanation for each answer.

1. Sound waves are longitudinal waves.

2. The speed of sound is faster in air than in water.

3. Sound cannot travel through a vacuum.

4. The frequency of a sound wave determines its pitch.

Calculating Wave Speed

Use the wave equation to calculate the speed of sound in different materials. Show all your workings.

1. A sound wave has a frequency of 500 Hz and a wavelength of 0.68 m. Calculate the speed of sound in the material.

2. If the speed of sound in water is 1500 m/s and the frequency is 1000 Hz, what is the wavelength?

Sound Intensity and Decibels

Answer the following questions about sound intensity and decibels. Use the formula for calculating decibels where necessary.

1. What is the intensity level in decibels of a sound with an intensity of 1x10^-5 W/m²?

2. If a sound is measured at 80 dB, what is its intensity in W/m²?

Exploring the Doppler Effect

Explain the Doppler Effect and how it affects the frequency of sound waves when the source is moving. Use the scenario provided to illustrate your answer.

A car is moving towards a stationary observer at a speed of 30 m/s. The car's horn emits a sound at a frequency of 500 Hz. Describe how the frequency heard by the observer changes as the car approaches.

Comparing Sound in Different Media

Study the table below comparing the speed of sound in different media. Answer the questions that follow.

Medium	Speed of Sound (m/s)	Density (kg/m³)
Air	343	1.225
Water	1484	1000
Steel	5960	7850

1. Which medium has the fastest speed of sound?

2. How does density affect the speed of sound in these media?

Applications of Ultrasound

Ultrasound has various applications in medicine and industry. Describe two uses of ultrasound and explain the principles behind each application.

1. Medical Imaging:

2. Industrial Non-destructive Testing:

Extended Writing: The Nature of Sound

Write a detailed essay discussing the nature of sound. Include how sound is produced, transmitted, and perceived. Use examples and diagrams where appropriate.

Discuss the nature of sound, including its production, transmission, and perception. Consider the roles of frequency, amplitude, and medium in your explanation. [15 marks]

Answer Key

Activity 1: True ; False ; True ; True

Activity 2: 340 m/s ; 1.5 m

Activity 3: 70 dB ; 1x10^-4 W/m²

Activity 4: The frequency increases as the car approaches

Activity 5: Steel ; Higher density generally means faster sound speed

Activity 6: Medical Imaging - uses reflection of sound waves to create images ; Industrial Testing - uses sound waves to detect flaws in materials

Activity 7: Essay will vary; key points include sound wave properties, transmission, and perception