Ultrasound and Infrasound
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Slide 1 - Diapositive
Label the diagram.
Crest
Amplitude
Wavelength
Trough
Slide 2 - Question de remorquage
Match the keywords to the definitions.
The number of waves per second.
The distance between the same point on neighbouring waves.
The distance between the middle of the wave and the top or bottom.
Frequency
Amplitude
Wavelength
Slide 3 - Question de remorquage
What is the unit of loudness?
A
Decibels (Db)
B
Hertz (Hz)
C
Meters per second (m/s)
D
Amps (A)
Slide 4 - Quiz
What is the unit of frequency?
A
Decibels (Db)
B
Hertz (Hz)
C
Meters per second (m/s)
D
Amps (A)
Slide 5 - Quiz
Which wave is louder?
A
Top
B
Bottom
Slide 6 - Quiz
Which wave is higher pitched?
A
Top
B
Bottom
Slide 7 - Quiz
Loudness (loud to quiet)
Pitch (high to low)
A
A
B
B
C
C
D
D
Slide 8 - Question de remorquage
Slide 9 - Diapositive
Slide 10 - Diapositive
Slide 11 - Diapositive
Slide 12 - Diapositive
Slide 13 - Diapositive
Slide 14 - Vidéo
Slide 15 - Diapositive
Slide 16 - Diapositive
Slide 17 - Vidéo
Name an animal which can hear lower frequency sounds than humans.
Slide 18 - Question ouverte
Name an animal which can hear higher frequency sounds than humans.
Slide 19 - Question ouverte
State a frequency of noise that a dog can hear but a mouse cannot.
Slide 20 - Question ouverte
State a frequency of noise that a mouse can hear but a dog cannot.
Slide 21 - Question ouverte
Dog whistles have a frequency range of 22,000 to 45,000 Hz. Why can a dog hear it but no one else can?
Slide 22 - Question ouverte
Slide 23 - Diapositive
Slide 24 - Diapositive
Slide 25 - Vidéo
Slide 26 - Diapositive
Slide 27 - Vidéo
Slide 28 - Diapositive
Slide 29 - Diapositive
Slide 30 - Diapositive
Slide 31 - Diapositive
Why do we use ultrasound instead of x-rays to see a foetus inside the mother's uterus?
