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Courses
Grade 9
Grade 9 Physics
Sound
Sound
Curriculum
1 Section
41 Lessons
96 Weeks
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Sound
41
2.1
Introduction
2.2
Objectives
2.3
Vibrating tuning fork
2.4
How is sound produced
2.5
Sound by different objects
2.6
Sources of sound
2.7
Vibrations
2.8
Sound is produced by vibrations
2.9
Longitudinal waves
2.10
Sound mades medium to travel
2.11
Give reason
2.12
Sound wave
2.13
Activity to understand sound wave travel through
2.14
Sound can travel through hard surface
2.15
Sound needs travel through a medium
2.16
Transverse wave
2.17
Characteristic of a sound wave
2.18
Loudness
2.19
Activity to understand vibration
2.20
About vibration
2.21
Questions
2.22
Frequency
2.23
Graphs
2.24
Second graph
2.25
Lowest frequency sound
2.26
Sound wave
2.27
Waveform
2.28
Time period
2.29
Speed of sound in different media
2.30
Supersonic speeds
2.31
Reflection of wave
2.32
Echo
2.33
Reverberation
2.34
Musical instruments
2.35
Range of hearing
2.36
Hearing aid
2.37
Application of ultrasound
2.38
Sonar
2.39
Ultrasonic waves
2.40
Stucture of human ear
2.41
Summary
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