DTM Dossier Reference Chart DTM Reference Chart
Demographic Transition Model & Pyramid Correlation
Student Reference 01
Indicator
Stage 1: High Stationary
Stage 2: Early Expanding
Stage 3: Late Expanding
Stage 4: Low Stationary
Stage 5: Declining
Birth Rate
High & Variable
High
Falling
Low
Very Low
Death Rate
High & Variable
Rapidly Falling
Falling Slowly
Low
Low
Natural Increase
Low / No Growth
Very High Growth
Moderate Growth
Low / No Growth
Negative Growth
Pyramid Shape
Concave Triangle
Wide base, very thin top.
Wide Triangle
Straight edges, wide base.
Beehive / Bell
Base begins to narrow.
Box / Column
Straight sides, stable.
Inverted
Narrow base, wider top.
Why do the shapes change?
Base (0-14): Wide base means more babies (High Birth Rate). Narrowing base means fewer babies (Falling Birth Rate).
Middle (15-64): Indicates the "Workforce." A large middle section supports the economy but may face underemployment if growth is too fast.
Top (65+): Indicates "Life Expectancy." A tall/wide top shows that many people are living to old age due to healthcare and stability.
The "Pattern" of Development
As countries industrialize and move from rural to urban areas, they move through these stages.
LDCs
(Less Developed)
NICs
(Newly Indust.)
MDCs
(More Developed)
Population Pulse Slides Human Geography: Demography
Population Pulse
Decoding the Demographic Transition Model through Population Pyramids
Warm-up: Vocab Match
Instructions
Match the term to its definition in your notes. You have 5 minutes!
A. Birth Rate
B. Death Rate
C. Life Expectancy
D. Industrialization
The average number of years a person is expected to live.
The process of a country moving from farming to manufacturing.
The number of live births per 1,000 people in a year.
The number of deaths per 1,000 people in a year.
Predicting the Future
Watch the video. Pay attention to the "Pattern" at the end!
Embedded media
0:00 - Start Focus Section: 9:24 - End
Tale of Two Pyramids
🇳🇬
Nigeria
Wide Base = High Birth Rate
Rapidly Growing Population
Large Youth Workforce (NIC)
🇯🇵
Japan
Narrow Base = Low Birth Rate
Aging Population (MDC)
Innovating for Labor Shortage
The Global Pattern
As countries develop, their population growth follows a predictable path:
Step 1
Rapid Growth
High Birth Rates, falling Death Rates (Stage 2/3)
Step 2
Stable Growth
Low Birth Rates match low Death Rates (Stage 4)
Step 3
Shrinking
Birth Rates drop below replacement (Stage 5)
Main Activity: Time Travelers
Your Mission
1 Go to PopulationPyramid.net
2 Search for your assigned country (UK, Brazil, or Kenya).
3 Find pyramids for 1950, 2023, and 2050 .
4 Analyze the shape shift and determine the DTM Stage.
Resource Link
PopulationPyramid.net
Exit Ticket Prediction
Earth in 2100
Based on what you learned about development and shrinking populations, what will the GLOBAL population pyramid look like in 2100?
Sketch It
Draw the predicted shape on your worksheet.
Justify It
Why will it look like that? Use "Industrialization" in your answer.
Submit
Hand in your Analysis Worksheet before you leave!
Time Traveler Worksheet Time Traveler Analysis
Population Dynamics & DTM Stages
Name
Date
Part 1: Vocabulary Match
Birth Rate
Death Rate
Life Expectancy
Industrialization
A. Average number of years a person is expected to live.
B. Moving from a farming-based economy to manufacturing.
C. Number of live births per 1,000 people per year.
D. Number of deaths per 1,000 people per year.
Part 2: Time Traveler Mission
Assigned Country:
Resource: PopulationPyramid.net
Year Sketch Shape (Simplified) DTM Stage Key Evidence / Observations 1950 2023 2050
Analysis Paragraph:
Explain the demographic shift your country has experienced or is projected to experience. Use terms like industrialization, birth rate, and life expectancy.
Part 3: Global Prediction (2100)
Sketch the GLOBAL Pyramid:
Sketch Area
Justify your prediction:
Explain why you chose this shape. What stage do you think MOST of the world will be in by 2100? Mention the impact of global development.
Demography Detective Teacher Guide Demography Detective
Teacher Facilitation Guide: Population Pulse
Lesson Duration
50 MIN
Lesson Objectives
Students will correlate population pyramid shapes with the 5 stages of the Demographic Transition Model (DTM).
Students will analyze historic and projected demographic data to track a country's development over time.
Students will predict future global population trends based on current development patterns.
Materials Needed
• Student Worksheets
• DTM Reference Charts
• Presentation Slides
• Student Devices (1:1)
• Internet: PopulationPyramid.net
Pacing & Facilitation
05 MIN
Warm-up: Vocab Match
Students complete Part 1 of the worksheet. Review answers immediately using Slide 2.
KEY: C-Birth Rate, D-Death Rate, A-Life Expectancy, B-Industrialization
10 MIN
Video & Recap
Watch the video (Slide 3). Pause at 9:24 and ask: "Based on Japan and Nigeria, what pattern do you think countries follow as they get richer?" Then play the conclusion.
25 MIN
Main Activity: Time Travelers
Distribute DTM Reference Charts. Assign countries. Ensure students understand how to change years on the website.Kenya: Rapid growth (Stage 2/3) -> Slowing.Brazil: Rapid (Stage 3) -> Stable (Stage 4).UK: Stable (Stage 4) -> Shrinking (Stage 5).
10 MIN
Closure: 2100 Prediction
Encourage students to think "Macro." If the pattern is Development = Lower Birth Rates, what happens when the whole world develops?
Sample Analysis (UK Example)
1950 (UK)
Shape: Boxy with thin top. Stage: 4. Birth rates stabilized after industrialization.
2023 (UK)
Shape: Boxy/Column. Stage: 4. Low birth rate, very high life expectancy.
2050 (UK)
Shape: Inverted (Narrower base). Stage: 5. Potential for population decline.
"My country (UK) followed the pattern of development. By 1950, it was already industrialized, leading to a Stage 4 stable population. By 2050, it is projected to move into Stage 5 as birth rates stay low and the elderly population increases, requiring robotic innovation or immigration as discussed in the video."
