1 The English language is constantly adding words to its repertoire. 2  Each year you may see a few creep into the vernacular that don't appear in the dictionary. 3  They could appeaâ¦. 4  Helping a Young Girl Understand Her First Menstrual Period Most girls experience their first menstrual period between the ages of 12 and 13.
It is also the length of a sidereal day -- the time it takes the earth to rotate 360Â°. A sidereal day could be measured using fixed stars. In conclusion the actual period of rotation of the earth is 23 hours 56 minutes and 4 seconds or 86,164 seconds.
Each rotation of the Earth takes approximately 24 hours. The Earth's rotation causes alternation of light and darkness which influences, temperatures, wind movements, and humidity. It takes approximately 365 days for the Earth to complete one revolution around the Sun. Because the Earth takes an elliptical path around the Sun, its distance from the Sun will vary.