Expanding Population
The age-sex pyramid of Nigeria as you can see is a triangular-shaped pyramid with a wide base and is typical of less developed countries. These have larger populations in lower age groups due to high birth rates. If you constructed the pyramids for Bangladesh and Mexico, it would look the same.
Constant Population
Australia’s age-sex pyramid is bell-shaped and tapered towards the top. This shows birth and death rates are almost equal leading to a near constant population.
Declining Population
The Japanese pyramid has a narrow base and a tapered top showing low birth and death rates. The population growth in developed countries is usually zero or negative.
Population Composition| Class 12 Geography Notes
Class 12 Geography Notes: Population Composition Class 12 Geography Notes are important for CBSE board exams of Class 12 students. They help students understand the different characteristics of populations, like age, gender, literacy, jobs, religion, and where people live.
By studying these notes, students learn about how societies are made up and how they change over time. Understanding population composition helps students see how societies work and how they can improve. These notes are essential for Class 12 students studying geography because they cover important topics that they need to know for their exams.
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