The Earth, the Sun, and the Moon are celestial bodies whose relative motions lead to various observable periodic cycles. Two such cycles are the daily cycle of day and night on Earth, and the monthly cycle of the Moon's phases. Which row correctly relates the periods of these cycles to the motion of the bodies?
| Period of day and night | Period of the Moon's phases | |
|---|---|---|
| A | the Earth orbits the Sun | the Moon rotates about its axis |
| B | the Earth rotates about its axis | the Moon orbits the Earth |
| C | the Earth rotates about its axis | the Moon orbits the Sun |
| D | the Earth orbits the Sun | the Moon orbits the Earth |
Row A
Row B
Row C
Row D
100 exam-style questions on CIE IGCSE Physics 6.1 The Earth and the Solar System, covering 6.1.1a Rotation of the Earth, the seasons and the Moon, 6.1.1b Average orbital speed, 6.1.2a Contents of the Solar System, 6.1.2b Formation of the Solar System, 6.1.2c Gravitational field strength of a planet, and 6.1.2d Orbits and gravitational attraction. Each one has a worked solution and a mark scheme showing where the marks go.