Name PeriodDate___

Environmental Science Chapter 9 Study Guide

1.What is a demographer? ______

2.What year did the world population reach 1 billion?: ______

  • How long did it take to double to 2 billion?:______Double again to 4 billion? ______
  • Will it take to double again to 8 billion? ______

3.What do you graph to make a population pyramid? ______

4What contributed the most to the exponential human growth? ______

5.What are 3 reasons education women lowers birthrates? ______

  • ______, ______

6.During which “age” did the world’s human population grow the fastest?______

7.What improvement could help a country control water borne diseases? ______

8.What happens inthe following demographic trends?

  • When birth rates and death rates are high the population grows______
  • When average number of children born to each woman falls, population______
  • In pre-industrial societies birth rates are______

9.Why did the human population double between 1880 and 1930? ______

10.Describe the following major demographic transition stages?

  • 1st stage ______
  • 2nd stage ______
  • 3rd stage ______
  • 4th stage ______

11.Why is wood a limited resource in many developing countries? ______

12.Name 3 strategies that could help control population growth? ______

______, ______

14.What region of earth is experiencing the biggest increase in population? ______

15.Demographers predict that the world’s population will stabilize at ______in the year ______.

16.What caused the cholera outbreak in Peru in 1991? ______

17.Counties with high birth rates have a population structure with? ______

18.Counties with low birth rates have a population structure with? ______

19.Name 3 reasons population reduction can be difficult for some countries:

  • ______
  • ______
  • ______

20.Name 4 countries with low or no population growth: ______,

______, ______, ______

21.Name 4 countries with very high population growth: ______,

______, ______, ______

22.How is dysentery spread? ______

23.Why is infrastructure so important to reducing population growth? ______

______

24.Difference in immigration and emigration: ______

25When will world population growth stop? ______

26.List 4 reasons populations could increase: ______

______, ______, ______

27.What is arable land? ______

  • Why is it important? ______

28.What happens in the following survivorship curves?Type I______

Type II______, Type III ______

29.Which continent will have negative growth by 2050? ______

30.If a population has high fertility what age group is in large numbers? ______

31.What does the histogram of a country with an explosive population look like? ______

______

32.What does the histogram of a country that has a stable population look like? ______

______

33.What does the histogram of a developed country look like? ______

______