Population: Population is an assemblage of individuals
of the same species occupying a particular locality at a given time.
Population Dynamics: Population dynamics refers to the
forces that work on the population to bring about whatever changes it shows.
Natality: Or the birth rate
refers to the rate of birth of new individuals in a population per unit time.
It is expressed as the number of new additions per thousand individuals of a
population in a year.
Mortality: Or the death rate refers to the loss of
individuals from a population per unit time. It is expressed as the loss in
the number of individuals per year per thousand individuals of a population.
Population Explosion: Tremendous increase in the number of
individuals of a population is called population explosion or overpopulation.
Doubling Time: The time needed by a population to double
Family Planning: The control of a family, where each family
has a small number of children, say, one or two and proper spacing between
two children is called family planning.
Immunisation: The process of
making individuals immune from a disease by injecting small doses or virulent
strain of germs or their toxins is called immunisation.
Zero Population growth: Zero population
growth is the situation where natality is equal to
those leaving the population.
Malnutrition: Disordered nutrition is called
malnutrition. Malnutrition occurs due to lack of sufficient food or excessive
Communicable Disease: Disease which is easily transferred
from one infected person to another person.
Potable Water: Water suitable for human consumption is
called potable water.
Contraception: Prevention of pregnancy is called
Contraceptive: A chemical or mechanical device, which
prevents conception (pregnancy) is known as
Intrauterine Device: A device inserted inside the uterus
to prevent conception is intranterive device.
Vasectomy: Removal of all or a segment of vasa deferentia
is called vasectomy.
Tubectomy: Removal of all or a
segment of fallopian tube is called tubectomy.
Immigration: It is the entry of additional persons into
the existing population from outside.
Emigration: It is the departure of some persons from
Demography: The branch of population study dealing with
the quantitative aspect of human population is called demography.