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Sound
SCIENCE
GRADE-9
NOV 5, 2020
Ms. Famin
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physics, science
Secondary Education
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SCIENCE
GRADE-9
NOV 5, 2020
Ms. Famin
Slide 1 - Slide
IDENTIFY THE COMPONENTS OF WAVE = IN CHAT BOX
Slide 2 - Slide
OBJECTIVES
Relate sound and loudness
Application of sound waves
Slide 3 - Slide
compare
compare
Slide 4 - Slide
interpret
Why is shout louder than a whisper?
Slide 5 - Slide
reason - amplitude
A shout carries more energy than a whisper and hence sounds louder
Amplitude of a wave depends on the amount of energy the wave carries.
More the amplitude more the energy
Slide 6 - Slide
Slide 7 - Slide
Slide 8 - Slide
the Decibel scale
loudness of sound is measured using decibel scale
Slide 9 - Slide
1. Which wave has the higher amplitude (a or b)? __
Slide 10 - Open question
2. Which wave is from the loudest sound? ___
Slide 11 - Open question
Which wave has vibrations that are closest together?
A
both
B
f
C
e
D
none
Slide 12 - Quiz
Which wave is from the highest pitch sound?
A
f
B
e
C
both
D
none
Slide 13 - Quiz
Analyze
did anybody experience echo where, how, when ?
Slide 14 - Slide
ECHO
An echo is a reflected sound wave
Slide 15 - Slide
application of sound waves - SONAR
ECHOLOCATION
Slide 16 - Slide
ULTRASOUND
Slide 17 - Slide
MENTION ANY TWO USES OF SOUND WAVES
Slide 18 - Open question
Slide 19 - Mind map
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