what is a population pyramid ?
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What is a population pyramid ?. - PowerPoint PPT PresentationTRANSCRIPT
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What is a population pyramid?
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“A population pyramid is a graphical illustration that shows the
distribution of various ____________________as well as
the __________________, the number of males per hundred
females and the dependency ratio, the number of people who are too
old or too young to work.
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What are some population characteristics of Sudan’s population? What does this tell you about the country?
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Stage 1: Low Growth
1.People depended on hunting and gathering for food.
2.Most of human history spent during this stage.
3.The NIR is essentially ________________.4.There is ______________ still in stage 1.
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1. Brought about by the ____________________.2. ___________ Plummets while the _________
remains the same as in stage 1.3. Allowed to spread to LDRs by the ___________
______________________ (20th century)
Stage 2: High Growth
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1. Brought about by _____________changes.2. Characterized by a sudden drop in the ______.3. There is still growth but not as fast as in Stage 2
Stage 3: Moderate Growth
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1. The ____________________2. Brought about by an aging population,
education, and family planning3. _________________________4. Low TFR (_______________)
Stage 4: Declining Growth
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1.___________because of an aging population. 2.NIR is _______ than Zero.3. Much of ____________ is entering this stage.
Stage 5: Negative Growth
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The following 5 slides are population pyramids of different areas on earth. Determine what
stage they are in by how they look.
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The United States of America
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Bolivia
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The Russian Federation
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Australia
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Central America