Travelling sound
Lesson 5 / 8
Lesson video
Lesson slides
Lesson details
Lesson outcome
Waxaan sharxi karaa sababta codka uu uga sii aamusnaan fogaan, iyo sababta mowjadaha codka ugu dhakhsaha badan adkaha iyo dareeraha marka loo eego gaasaska, laakiin aan gabaad ka dhex mari karin.
Introduction
In this lesson: I can explain why sounds are quieter at a greater distance, and why sound waves travel faster in solids and liquids than gases but not at all through a vacuum. Sound spreads out and becomes quieter (lower amplitude vibrations) as it travels. Sound travels through a medium by vibrations being passed on between the particles of the medium.
Show transcript
Worksheet
not available yet
Quizzes
1. A vibrating object creates a sound. Which of the following correctly describes the amplitude of the vibration?
- how high the sound is
- the speed of the vibrating object
- the number of vibrations per second
- Correct answer:the furthest distance the object moves from its original position
2. A vibrating object creates a sound. Which of the following correctly describes the change in the sound heard if the amplitude of the vibration decreases?
- The volume of the sound increases.
- Correct answer:The volume of the sound decreases.
- The pitch of the sound increases.
- The pitch of the sound decreases.
3. Which of the following correctly describes the movement of air particles when a sound wave travels through the air?
- They are carried along with the sound wave.
- Correct answer:They vibrate back and forth and do not travel.
- They move away from the source of the sound.
4. Solids, liquids and gases are made of particles. Which of the following describe the arrangement or the movement of particles in a solid?
- Correct answer:They are very close together.
- They can move around each other.
- Correct answer:They are tightly bound to neighbouring particles.
- Correct answer:They vibrate around fixed positions.
5. Which of the following describe the arrangement or the movement of particles in a liquid?
- Correct answer:They can move around each other.
- They are tightly bound to neighbouring particles.
- They vibrate around fixed positions.
- They are much farther apart than in solids.
6. Which of the following describe the arrangement or the movement of particles in a gas?
- Correct answer:They can move around each other.
- They vibrate around fixed positions.
- They are tightly bound to neighbouring particles.
- Correct answer:They are much farther apart than in liquids.
1. Which of the following words means ‘a completely empty area of space’?
- continuum
- vaccine
- vacuole
- Correct answer:vacuum
- vanadium
2. Which of the following words means ‘a substance that a wave travels through’?
- small
- mean
- Correct answer:medium
- median
- large
3. How many of the following can sound travel through: vacuum, gas, liquid, solid?
- none of them
- 1
- 2
- Correct answer:3
- 4
4. Which of the following explains why sound travels at different speeds through solids, liquids and gases?
- Sound waves can travel faster through larger gaps between particles in gases.
- Correct answer:Vibrations are passed along faster if particles are bonded together.
- Vibrations are passed along faster if the particles can move around each other.
5. A vibrating object creates a sound. Which of the following correctly describes the change in the sound heard the further a sound wave travels?
- Correct answer:The sound gets quieter.
- The amplitude of particle vibrations increases.
- Correct answer:The energy of the sound wave is shared between more particles.
- The energy of the sound wave is shared between fewer particles.
What pupils see
The same lesson as a pupil sees it. You can set any section as work on its own.
- IntroductionPrepare
- Starter quizActivate · 6 questions
- Lesson videoLearn
- Exit quizCheck · 5 questions