1. Starter Look at your marked homework.
Lesson Aims:
Look at your marked homework.
Write your mark in the tracking sheet (Spectrum)
Write what you need to improve onto the tracking sheet.
Can you correct the answers you got wrong using your exercise book to help you?

2. Which has the higher pitch?
Lesson Aims: B A

3. Which has the louder sound?
Lesson Aims:
The frequency of each sound is identical so what can you say about the pitch? B A

4. Sound
Lesson Aims:
Carry
To be able to say if a sound will be in the range of human hearing from its frequency.
To know the difference in a sound wave for a loud/ quiet/ high or low pitch sound.
To explain the dB scale for loudness.
To describe some effects of excess noise on health

5. What is Sound
Lesson Aims:
Sound is a vibration that travels as a wave from one place to another.
Sound is detected by ears and microphones.
A vibrating source is needed to create sound, for example your voice box, a loud speaker, a ruler that has been ‘twanged’.
Sound travels through solids and liquids, but not through a vacuum.

6. Pitch and Volume
Lesson Aims:
Copy:
A high pitch sound has many vibrations every second (a high frequency). A low pitch sound has less vibrations every second (a low frequency).
A loud sound has large vibrations (a large amplitude). A quiet sound has small vibrations (a small amplitude).
Trace diagrams…

7. Loudness
Lesson Aims:
The loudness of a sound is measured on the Decibel scale (dB).
This scale is not linear.
Prolonged and repeated exposure to sounds above 90dB can damage your hearing.

8. Range of human hearing
Lesson Aims:
Humans can typically hear sounds between frequencies of 20 to Hz This range decreases with age. Sounds above this frequency are called ultrasound

9. Ultrasound
Lesson Aims:

10. Investigating Sound
Lesson Aims:
Aim To see what effects the sound created by a test tube Method: Tap each test tube and observe Blow across each test tube and observe
Blow over test tubes and demo tapping with beakers much better

11. Results
Lesson Aims:

12. Conclusion
Lesson Aims:
When the test tube is tapped it is the that vibrates. The more there is the the pitch of the note. The less there is the the of the note. When the test tube is blown across it is the --- that The more --- there is the the of the note. The there is the the pitch of the note.

13. Conclusion
Lesson Aims:
When the test tube is tapped it is water that vibrates. The more water there is the lower the pitch of the note. The less water there is the higher the pitch of the note. When the test tube is blown across it is the air that vibrates. The more air there is the lower the pitch of the note. The less air there is the higher the pitch of the note.