Sound waves travel through air as longitudinal waves consisting of alternating regions of compression and rarefaction. Which statement correctly compares a rarefaction with a compression?
In a rarefaction, the air pressure is higher than in a compression.
In a rarefaction, the distance between air particles is smaller than in a compression.
In a rarefaction, the air pressure is lower than in a compression.
In a rarefaction, the frequency of the sound is lower than in a compression.
295 exam-style questions on CIE IGCSE Physics Sound, covering Sound. Each one has a worked solution and a mark scheme showing where the marks go.