1. SOUNDS
In
Solids, Liquids and Gases

2. Sounds In Solids, Liquids And Gases
Learning Intension
We are learning about
How sound travels through materials.
How to use a model to explain how particles help
transmit sound.
Copy and answer starter
What does most of the
sound we hear travel
through?
Keywords
Transmit
Particles
Model
Sound
Travel

3. Class Discussion
How do you
hear the
sound from a
rock concert?

4. Sound in a vacuum
Write down all you know about sound
travelling in a vacuum.
Can sound travel through a vacuum?

5. Sound in a vacuum
Why won’t sound travel in a vacuum?

6. Sounds and Particles
Question: Use particle theory to explain how
sound travels through a solid.
(1 mark) for use of diagram
(1 mark) for using the right terminology
(1 mark) for getting the answer right

7. Your task: Suggest why sound does not
travel through foam.

8. Homework
1. Ultrasonic sound-what are they?
2. Give examples.
3. Describe three uses of ultrasonic sound
Due date: Friday 17th January 2014