Time

According to Google's dictionary, time is 'the indefinite continued progress of existence and events in the past, present, and future regarded as a whole'. Time is considered as the 'fourth dimension' among three spatial dimensions of 'our' universe.
==How is Time measured==
Time is measured in seconds in Standard International system as well as CG system.  A second is defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyper-fine levels of the ground state of the cesium-133 atom. 
To make time measuring fast and simple, over years many terms like 'hour', 'minute', 'day', 'month', etc have taken shape. 
60 seconds = 1 minute
60 minutes = 1 hour = 3600 seconds
24 hours = 1 day = 1440 minutes = 86400 seconds
7 days = 1 week
30
* days = 1 month
365 days = 1 year
*
Category:Physics