Describe qualitatively, using the wave model, the features of waves including wavelength, frequency and speed.

1. Energy transfer through
different mediums can be
explained using wave
and particle models.
-DESCRIBE QUALITATIVELY, USING THE WAVE MODEL, THE FEATURES OF
WAVES INCLUDING WAVELENGTH, FREQUENCY AND SPEED.

2. What do you know about waves?

3.  Waves are the transfer of energy through different mediums and space.
 There are two types of waves;
• longitudinal (compression) waves e.g sound waves. Particles move back and
forth parallel to the direction of the wave.
• Transverse waves e.g electromagnetic waves and waves at the beach. Particles
move perpendicular to direction of the wave.
(gcsescience.com, 2018)

4. Features of a wave
 Wavelength (λ) : A wavelength is a measure of distance between two
identical points on a wave (Rouse, 2018).
 Frequency (f): The number of waves that pass a fixed point in unit time
(Gregersen, 2018) is defined as the frequency of a wave.
 Speed (s): The speed is a measure of how fast the wave is moving through
space.
 Amplitude (a): the distance from the middle of a wave to the top of a
crest or to the bottom of a trough.

6. Increase Increase Increase Increase
Decrease Decrease Decrease Decrease
λ f s a

9. Frequency
increased

10. Frequency
Decrease

13. Fast wave

14. Slow wave