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Learning objective

Students should be able to describe and explain the growth patterns of populations, including lag, exponential (log), and carrying capacity phases. They should also be able to discuss birth and death rates, the changes in human populations, and the factors that influence both birth and death rates as well as migration.

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Cambridge IGCSE Environmental ManagementHuman population

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Students should be able to describe and explain the growth patterns of populations, including lag, exponential (log), and carrying capacity phases. They should also be able to discuss birth and death rates, the changes in human populations, and the factors that influence both birth and death rates as well as migration

  • This point belongs to Changes in population size, especially Changes in population size outcomes.
  • You need to be able to students should be able to describe and explain the growth patterns of populations, including lag, exponential (log), and carrying capacity phases. They should also be able to discuss birth and death rates, the changes in human populations, and the factors that influence both birth and death rates as well as migration.
  • The key ideas to know are Describe, Explain, and Discuss.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DescribeExplainDiscuss

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Paper 1 structured question: Changes in population size

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Diagram Description

Population Growth Curve

A graph shows population size over time with three phases: lag phase (slow growth), exponential phase (rapid growth), and carrying capacity phase (stable population).

  1. a

    Describe Describe the three phases of population growth shown in the graph.

    Aim for approximately 3 distinct marking points.

    [3]
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