Ultrasound and Infrasound

What have you learnt about waves so far?
(longitudinal and transverse)

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Slide 1: Mind map

ScienceLower Secondary (Key Stage 3)

This lesson contains 33 slides, with interactive quizzes, text slides and 1 video.

Lesson duration is: 50 min

Items in this lesson

What have you learnt about waves so far?
(longitudinal and transverse)

Slide 1 - Mind map

Slide 2 - Slide

Slide 3 - Slide

Slide 4 - Slide

Slide 5 - Slide

Slide 6 - Slide

Slide 7 - Slide

Slide 8 - Slide

Slide 9 - Slide

Slide 10 - Video

The human auditory range is...

Slide 11 - Open question

Sounds with a frequency below 20 Hz are called...

Slide 12 - Open question

Sounds with a frequency above 20,000 Hz are called...

Slide 13 - Open question

Slide 14 - Slide

Slide 15 - Slide

Name an animal which can hear lower frequency sounds than humans.

Slide 16 - Open question

Name an animal which can hear higher frequency sounds than humans.

Slide 17 - Open question

State a frequency of noise that a dog can hear but a mouse cannot.

Slide 18 - Open question

State a frequency of noise that a mouse can hear but a dog cannot.

Slide 19 - Open question

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 20 - Open question

Slide 21 - Slide

Slide 22 - Slide

Slide 23 - Slide

Slide 24 - Slide

Slide 25 - Slide

Why are ultrasound used for pregnancy scans and not x-rays?

Slide 26 - Open question

State another use of ultrasound in a hospital setting.

Slide 27 - Open question

Slide 28 - Slide

Slide 29 - Slide

Slide 30 - Slide

Slide 31 - Slide

Slide 32 - Slide

In the USA, tornadoes cause massive fatalities every year. Explain how they can use infrasound to protect people.

Slide 33 - Open question