13 marks
Outline the meaning of the term Crude Birth Rate (CBR).
Do not give the formula for calculating CBR as your answer.
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Human Population Dynamics (DP IB Environmental Systems & Societies (ESS): SL)
Exam Questions
41 mins10 questions22 marks
A country has a CBR of 37 births per 1 000 individuals and a CDR of 14 deaths per 1 000 individuals.
Using the formula provided below, calculate the Natural Increase Rate (annual growth rate) of this country.
NIR=CBR-CDR10{"language":"en","fontFamily":"Times New Roman","fontSize":"18","autoformat":true}
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31 mark
The figure below shows a simple version of a model used to study human populations.
State the name of this model.
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41 mark
State the name of the particular type of graph shown in the figures below.
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1a3 marks
Suggest three issues resulting from human population increase.
1b3 marks
The figures below show the population of the world in 2017 and one prediction of the world population in 2050.
i)
What was the percentage of females aged 25–29 in the world in 2017?
[1]
ii)
Describe the predicted percentage changes in the world population in people aged from 0 to 49 and those aged 50 and over.
[2]
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24 marks
The figure below shows information about birth rates and death rates in Mexico (an LEDC) between 1900 and 2060 (estimated from 2024 onwards).
Suggest reasons to explain why the population growth rate in Mexico is predicted to decrease between the present day and 2060.
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34 marks
The figure below shows a simple version of the Demographic Transition Model.
Using information from the figure, explain why the rate of population growth changes as a country moves from Stage 1 to Stage 4.
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44 marks
Outline why birth rates are still high in many LEDCs.
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17 marks
Fertility and crude birth rate are two demographic variables that can be used to assess human population growth.
Explain the strengths and weaknesses of these variables as indicators of growth in human populations.
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29 marks
Discuss how national and international development policies can reduce human population growth.
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