Orbit:- The fixed paths followed by the planets while moving around the Sun. Axis: An imaginary line passes through the centre of the Earth.

A satellite is an object that revolves around a planet. The moon is the natural satellite of the Earth .

Stars are huge ball of burning gases. They produce heat and light of their own.Planets are huge round objects that go around the Sun.

Group stars that appear to form different patterns or designs in the sky. Orion, Ursa Major

Force is a push or pull applied on an object. Force helps us to move things, stop moving moving things, change direction of an object,

The revolution of the Earth around the Sun and the tilted axis of the Earth cause change of season/

A dark patch formed when an object blocks the path of light. Shadows are longer in the morning and evening and shortest at noon.

Gibbous moon : After 10 days of the new moon and we can see more than half of the moon.Crescent moon:- After three days of the new moon, we can see a small part

Luminous : Objects that give out light. Non luminous :- Objects that do not give out light.

Mercury, Venous, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

Transparent: Objects through which light can pass through. Opaque: Objects through which light cannot pass.

The movement of the earth on its axis. Rotation causes day and night.The earth complete one rotation in 24 hours.The Earth spins from west to east.