question_answer 1)

Answer the following questions briefly: (a) What is the angle of inclination of the earth's axis with its orbital plane?   (b) Define rotation and revolution.

Answer:

(a)The tilting of earth on its axis by 23V2 is known as the inclinations of the earth's axis. (b)The earth moves on its axis in 24 hours. This movement of the earth is called rotation. It causes days and nights.The earth also makes a complete circle round the sun in  days. This movement of the earth is called revolution. It is responsible for the change in season.                       Rotation                                                           Revolution (i) The continuous spining of                              (i) The movement of earth round earth on its own axis is called                                the sun is called revolution. rotation,                                            (ii) It takes twenty-four hours to                        (ii) Earth takes 365 1/4  days to make a  earth to complete one rotation                               complete round of the sun while  on its axis.                                                                   rotating along its axis. (iii) The rotation of earth causes                      (iii) It causes cycle of the seasons.      day and night.