Which of the following is the correct definition of an Astronomical Unit (AU)?
the average distance between the Earth and the Sun
the distance that light travels through a vacuum in one year
the time taken for light to travel from the Sun to the Earth
the orbital speed of the Earth as it moves around the Sun
60 exam-style questions on CIE IGCSE Physics 6.1.2a Contents of the Solar System. Each one has a worked solution and a mark scheme showing where the marks go.