Sound

SCIENCE 
GRADE-9
NOV 5, 2020
Ms. Famin
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Slide 1: Slide
physics, scienceSecondary Education

This lesson contains 19 slides, with interactive quizzes and text slides.

Items in this lesson

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