Key Stage 3 (KS3) Waves Practice Test

In transverse waves, the defining characteristic is that the particles of the medium move perpendicular to the direction in which the wave travels. For example, when you create a wave in a rope by moving one end up and down, the wave travels horizontally while the rope particles move vertically. This perpendicular motion is what gives transverse waves their name and distinguishes them from longitudinal waves, where particles move parallel to the wave direction.

In contrast, the other options do not accurately describe transverse waves. In transverse waves, the particles do not move in the same direction as the wave travels, and waves can propagate through different mediums, including solids and some liquids, not just solids. Additionally, the amplitude of a wave refers to the maximum displacement of particles from their rest position, and it is not always zero; it represents the strength of the wave.