Planets
Revolution
Mercury, Venus, Earth, Mars, Jupiter, Saturn,Uranus, and Neptune.
Mercury is closest to the sun while neptune is the farthest.
The biggest planet is Jupiter.
- The movement of the earth around the sun is called revolution.
- Earth takes 3651/4 days to complete one revolution around the sun.
- Due to the revolution of the earth, seasons are caused.
Solar system - Definition
Rotation
- The collection of eight planets and their moons in orbit round the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
- The movement of earth on its axis is called rotation.
- Earth takes 24 hours to complete one rotation.
- The rotation of the earth causes day and night.