6
Why does population change?
Living in society
Many factors can affect population: people are born or die,
and people move around to find work or escape natural
disasters and wars.
1
Look at the bar chart. Answer the questions in your notebook.
a)
What was the population of Illes Balears in 2011?
b)
What was the population in 2013?
c)
Has the population increased or decreased?
G
E T T I N G S T A R T E D
Did you know that
more than 30% of the
world’s population are
either Chinese or Indian?
That’s because China and
India are the world’s most
populated countries.
G
E
O
-
F
A
C
T
The
fertility rate
is the
average
number of children per family. The fertility
rate in Europe is about 1.6. This means that most families have two
children, or fewer. This number is calculated by dividing the total number
of children by the total number of families.
Natural changes
in population can happen when there are more births
in a country than deaths. This results in an
increase
in population. If there
are more deaths than births, population
decreases
.
2011 2013
Population of Illes Balears
1 100 503
1 111 674
1 000 000
500 000
0
