Which statement correctly describes the shape of a comet's orbit and the position of the Sun?
The orbit is circular, and the Sun is located at the centre of the circle.
The orbit is circular, and the Sun is located at a position other than the centre.
The orbit is highly elliptical, and the Sun is located at the centre of the ellipse.
The orbit is highly elliptical, and the Sun is located at one focus of the ellipse.
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.