Death rate is the number of deaths:

1. per 1000 people per year
2. per 100 people per decade
3. per 1000 people per decade
4. per 100 people per year

What was directly responsible for the rapid rise of world population in the twentieth century ?

1. Better education and jobs
2. Religious and social customs
3. Better healthcare
4. Increased food production

Birth rate is technically termed as :

1. Population density
2. Natality
3. Carrying capacity
4. Mortality

Which of the following is an exhaustible source of energy ?

1. Fossil fuels
2. Nuclear energy
3. Solar energy
4. Wind energy