Population (means) _______ the number of people who
live in a particular area. The population of the world (does not
stay)_________ the same. At the moment it _______ (is growing) at an
increasing rate. ln fact, scientists (believe) that the world
population will increase until 2200, and then stop growing. However,
things are not the same in all parts of the world. At present in many
Western industrial countries the population (is falling)___________. This
(happens) ________ because families are small, and health conditions are
good. In developing countries, on the other hand, the population (is rising)
____sharply. In Ghana, for example, most families (have)______several
children. Many children in Ghana (are dying)_____ from illness, so it is
important to have lots of children. They earn money for the family and
(look after) ______their parents in old age.
Tropical forests grow near the Equator where _it___ is warm and wet.
___There___are only two seasons, rainy and dry. ___It___ is normally 20-25°C in
a tropical forest and __there___is only a drop of about 5°C in the coldest
months. ___There__is a lot of rain, on average more than 200 cm per
year.__There___ is poor soil, and __it_ is difficult for plants on the forest
floor to develop, as tall trees (25-35 meters) block the light.
___There___are many plants, birds, animals and insects. ___There__are different
kinds of tropical forests with different kinds of trees. ___It___ depends
on the temperature and the amount of rainfall.