1 Health benefits of watermelon are actually expansive and the fruit also contains traces of the mineral potassium which helps in the day to day functioning of the body.  The phytochemicals help in lowering blood pressure and the lycopene helps fight cancer and increase immunity.
census - a periodic count of the population. nose count, nosecount. counting, enumeration, numeration, count, reckoning, tally - the act of counting; reciting numbers in ascending order; the counting continued for several hours.
survey (social survey) (noun) A research method that collects data from respondents through a series of questions either in the form of a questionnaire or an interview. The terms survey and social survey are used interchangeably in a sociological context.