The questions in this quiz are suitable for GCSE physics students who are studying sound waves, ultrasound and seismic waves. If you struggled with the quiz, don't panic - we've got you!

Newell, jun., H. E., in Physics of the Upper Atmosphere, edit. by Ratcliffe, J. A., 83 (Academic Press, New York and London, 1960).

In new research, physicists have theorized a bold way to change it up by entangling two particles of very different kinds – a ...