Skip to content
TeachersGo to pupils ✏️
CasharOpen learning
SO — SoomaaliEN — English

Travelling vibrations

Lesson 1 / 8

View unitNext lesson →View as pupil →

Lesson video

0:00 / 0:00

Lesson slides

not available yet

Download · PPTXDownload · PDF

Lesson details

Lesson outcome

Waxaan sharxi karaa sida gariirka loo gudbiyo hawada, si codka loo maqlo.

Introduction

In this lesson: I can explain how vibrations are passed to and through the air, to allow sounds to be heard. A vibrating object causes nearby air particles to vibrate too. Air particles are knocked forwards but then spread backwards when the object moves back.

Show transcript
A vibrating object causes nearby air particles to vibrate too. Air particles are knocked forwards but then spread backwards when the object moves back. Vibrating air particles knock into their neighbours and set them vibrating too, in the same way. The pattern of vibrating particles creates a sound wave. Sound does not involve air particles travelling. Scientific models often only accurately reflect some aspects of what they represent.

Worksheet

not available yet

Quizzes

  1. 1. Which of the following actions are vibrations?

    • repeated growing and shrinking
    • Correct answer:repeated movements up and down
    • Correct answer:repeated movements left and right
    • Correct answer:repeated movements forwards and backwards

  2. 2. Three things that can make sounds are: a human speaking, a flute and a violin. How many of these cause sounds by making something vibrate?

    • none of them
    • one
    • two
    • Correct answer:three

  3. 3. Which of the following changes will lower the pitch of the sound made by a drum?

    • Correct answer:Make the drum skin less tight.
    • Use a smaller drum.
    • Hit the drum more softly.

  1. 1. Which of the following is a description of a wave?

    • Correct answer:a travelling disturbance
    • a collection of particles
    • an amount of energy

  2. 2. A vibrating ruler makes a sound. Each time the ruler moves forwards, it pushes air particles forwards. What do these particles do to make the sound travel forwards across the room?

    • They travel to the other side of the room.
    • Correct answer:They hit air particles in front of them.
    • They pull on other air particles that are joined to them.
    • They stick to air particles in front of them.

  3. 3. Which of the following explains how a person can hear a sound?

    • The sound wave makes air build up inside the ear.
    • Correct answer:The sound wave makes part of the ear move back and forth.
    • The sound wave warms and cools the ear.

  4. 4. A scientific model is {{}} about a part or behaviour of the real world.

    • an exact description
    • a picture we can draw
    • a good guess we can make
    • Correct answer:a helpful but not always accurate way of thinking
    • a 3D model we can make (with clay, for example)

  5. 5. In a simple model of a sound wave in air, air particles simply move back and forth. The wave travels because particles hit other particles. Which of the following details does this model ignore?

    • the fact that air is a gas
    • Correct answer:the random motions of the air particles
    • the back and forth vibrations of the air particles
    • Correct answer:the different types of air particle

What pupils see

The same lesson as a pupil sees it. You can set any section as work on its own.

  • IntroductionPrepare
  • Starter quizActivate · 3 questions
  • Lesson videoLearn
  • Exit quizCheck · 5 questions
This content is by Cashar and published under an open licence.