Page 85 - Big Ideas Year 9 sciPAD 2025

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SCIPAD - BIG IDEAS - BOOK 1
THE IMPORTANCE OF WAVES
What is a Wave?
Waves are vibrations that transfer energy as they move. Both sound and light travel as waves.
There are two different types of waves - transverse waves and longitudinal waves.
Transverse Waves
Matter travels up and down at 90° to the
direction the wave is travelling. Ripples in
water are transverse waves. Radio waves
(like the ones used by wireless devices are
also transverse waves.
Longitudinal Waves
The matter carrying a longitudinal wave moves
parallel to the direction the wave is travelling
by alternating between compressing and
stretching. Sound waves are longitudinal
waves.
2. Label the following diagrams as either transverse waves or longitudinal waves.
(a) A wave created in a rope is a
(b) A wave created in a slinky is a
(c) The wave created by a speaker is a
(d) The wave created by a wifi router is a
1. Complete the following sentences by filling in the missing words.
Waves are that transfer energy. Light waves are an
example of a wave. These waves move up and down
at degrees to the direction they are travelling.
on a water surface are another example of a transverse wave.
Sound waves are an example of a wave. These
waves move in to the direction they are travelling.
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