Motions of the Earth CBSE Class VI Geography

Hello friends, I am Anirudh Agrawal, class five, student Delhi. and today we are discussing about motions of the Earth What are the motions of the Earth? Number 1, Rotation: it is the movement of the Earth on its axis What are the motions of the Earth? Number two Revolution The movement of the Earth around the sun in a fixed path of the orbit is called "the revolution" What is orbital plane? The plane formed by the orbit is known as orbital plane The axis of the Earth which is an imaginary line makes an angle of 66 and a half degree with its orbital plane. What is circle of illumination? Due to the spherical shape of the Earth only half of it gets light from the Sun at a time the portion facing the Sun experiences day while the other half away from the Sun experiences night. The circle that divides the day from night on the globe is called the circle of illumination. The circle of illumination does not coincide with the axis. What is Earth day? The Earth takes about 24 hours to complete one rotation around its axis. This is the daily rotation of the Earth. This period of rotation is known as "the Earth day" Why February has 29 days It takes exact 365 days and 6 hours to complete one revolution around the Sun. However, we count 1 year equals 365 days only and ignore 6 hours for sake of convenience. Six hours saved energy year are added to make one day (24 hours) over a span of 4 years Thus, every fourth year February is of 29 days instead of 28 days. What is leap year? A year with 366 days is called a leap year. Manner of revolution The Earth revolves around the Sun in an elliptical orbit Throughout it revolution around the orbit the Earth inclined in the same direction Types of seasons. summer seasons winter seasons spring seasons autumn seasons Why there is change in seasons ?