The birth rate is the number of live births per 1,000 population in a period while the fertility rate is the average number of children born to childbearing women age between 15-44.
<u>Explanation:</u>
The average number of children that would be born to a women over her life span is termed as absolute/potential natality or simply the total fertility rate. There are two situations for such women first: if during her lifespan, she was to experience the exact current age-specific fertility rates (ASFRs). And second: if she was to live her reproductive life from birth to the end.
While the total number of live births per one thousand of population in a year or assigned time duration is understood as "birth rate". It is calculated from a population census, global registration system for births or by demographic techniques.
Biosphere means all the plants and animals on earth, and the Hydrosphere means all water on earth, without water, all plants and animals would die. So uf no Hydrosphere,no biosphere.
