H. G. Wells: “History is a race between education and catastrophe”.

lunes, 12 de diciembre de 2016

3º CC.SS. - TEMA 3 - Repaso


1.- If the world's population is 7.4 billion, and Earth's total area (including land and water) is 510 million square kilometers (197 million square miles), calculate the worldwide human population density.

2.- True or false?
a) The birth rate is the number of births in a year.
b) The fertility rate is the average number of women per child.
c) The death rate is the number of deaths in one year.
d) Life expectancy is the average life span of a person.
e) The difference between the birth rate and death rate is the vegetative or natural increase rate.

3.- Correct if necessary:
  • Two thousand years ago, there were around one billion people in the world:
  • In the stage one of demographic growth the birthrate is very low:
  • In the stage two of demographic growth natural increase is slightly negative:
  • In the stage three of demographic growth birthrate is high:
  • In the stage four of demographic growth infant mortality is higher than 200‰:
  • 90% of the people live in the Southern Hemisphere:
  • Europe is a historically uninhabited continent:
  • People are attracted by extreme climates:
  • The fertility rate in a place is the number of babies born there for every 1000 women (between the ages of 25 and 29 years old):
  • The infant mortality rate in a place is the number of children under the age of ten that die:

Unit