Pratique du Shadowing: The Demographic Transition Model Explained | Geography | ClickView - Apprendre l'anglais à l'oral avec YouTube

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- [Narrator] For most of human history life has been a rather brutal affair.
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- [Narrator] For most of human history life has been a rather brutal affair.
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Both birth rates and death rates were high, making populations relatively stable.
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With almost eight billion people alive today, our world is a very different place from what it has ever been.
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To understand the complex relationship between changes in a population as a nation develops over time, demographers can use what's called the Demographic Transition Model.
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This theory of population change describe transitions between five stages of development.
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Each stage is defined by the relationship between the birth and death rate which in turn influences the rate of growth or decline.
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These changes are based on the influences of various social and economic developments.
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Let's break these stages down in more detail.
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What we know of ancient humans tells us that around one in four infants died before their first birthday.
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As many as half of all humans died before puberty.
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With such a high mortality rate populations needed high birth rates just to survive.
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Demographers refer to this balance as Stage One of the Demographic Transition Model.
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Relatively equal rates of births and deaths means the population size is generally stable.
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A population pyramid for this stage would have a wide base and a narrow top.
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While some regions today could arguably be described as Stage One, most demographers see it as a stage in our past.
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For many countries, it began changing during the Industrial Revolution in the late 18th century.
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Thanks to centuries of science, know a lot about how to keep food and water germ free, how to keep wounds from becoming infected, and how to vaccinate against many diseases.
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As people gain access to basic levels of healthcare, sanitation, and food security, the death rate falls, especially among children.
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Meanwhile, the birth rate remains high.
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While Stage One was relatively stable, Stage Two represents a population explosion.
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More children survive and have children of their own.
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Nations south of the Sahara in Africa, such as South Sudan and Nigeria, are considered to be at Stage Two of the model.
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As medicine and technology advance and more children survive, families start having fewer babies.
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Expanding populations also experience some significant cultural changes.
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There are more educational opportunities, especially for women.
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Better education leads to higher employment rates, meaning women have options other than being full-time mothers, including having a stronger say in how a community is run.
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Wealth, power, and innovation also help promote access to and use of contraception.
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These factors lead to a period of growth that's slower than before.
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Nations such as India, Brazil, and Vietnam are seen as being in this stage.
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Populations are still increasing, but at a reduced rate compared to Stage Two.
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Over time the reduced birth rate will be matched by a relatively low death rate, and the population will no longer increase or decrease.
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Stage Four of the Demographic Transition Model is when low death rates and low birth rates create a stable population.
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Most of world's developed nations such as the US, France, Canada, and Australia are at Stage Four.
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When birth rates remain below the approximate 2.1 children per woman that is necessary for keeping even the healthiest population stable, the number of people declines.
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If current predictions hold, a number of nations could soon join Japan and Germany in the fifth and final stage of the Demographic Transition Model.
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High costs of living, fear of global catastrophes, and other social pressures could see fewer people choosing to have children.
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Smaller populations might seem like a win for the environment, demanding fewer resources and leaving less waste.
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But the pressures on the economy will increase in the short term, as there are fewer young people to care for a slowly aging population.
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Nations, such as Germany and Japan, are already facing this decline.
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Other countries such as China might not be far behind.
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These nations must consider how to meet the challenges of a shrinking population.
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Croatia is another nation that could be seen as experiencing Stage Five.
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From the 1950s through the 1970s, 1980s, and to today, Croatia has represented each stage of the Demographic Transition Model.
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How countries will develop in the future is a hot topic for discussion.
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The Demographic Transition Model is useful but like all models, it has limits.
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From the devastation of wars and pandemics to surprises delivered by economic booms and new form of economics, anything could affect the population of Earth in the near and distant future.
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About This Lesson

In this lesson, learners will explore the Demographic Transition Model, a crucial concept in understanding population changes over time. As you engage with the material, you will practice your English speaking skills by discussing various stages of demographic transition, examining key terms, and using vocabulary in context. This lesson aims to enhance your English speaking practice, particularly in articulating complex ideas clearly. By understanding how populations evolve, you will not only improve your language fluency but also gain insight into sociocultural dynamics. Through targeted activities, you'll apply the shadowing technique to enhance your pronunciation and intonation.

Key Vocabulary & Phrases

  • Demographic Transition Model - A theory describing population changes over five stages.
  • Population explosion - A significant increase in a population size.
  • Birth rate - The number of live births per thousand of the population in a year.
  • Death rate - The number of deaths per thousand of the population in a year.
  • Healthcare - The organized provision of medical care.
  • Sanitation - Conditions that affect hygiene and health.
  • Contraception - Methods of preventing pregnancy.
  • Stable population - When the birth and death rates are balanced, leading to little or no population growth.

Practice Tips

To maximize your learning from this lesson, consider the following tips when practicing the material:

  • Use a shadowing app: Find a shadowing app to help you record your voice as you repeat the phrases from the transcript. This will allow you to compare your pronunciation with that of native speakers.
  • Pace yourself: The transcript may contain complex vocabulary and concepts. Start slowly by reading along while listening, gradually increasing your speed as you become more comfortable.
  • Focus on intonation: When you practice, pay attention to the tone and rhythm of the speaker. Emphasizing certain words and phrases can significantly improve your English speaking skills.
  • Visualize concepts: While practicing, visualize the population model stages as you discuss them. This can help you articulate your thoughts more coherently during your speaking practice.
  • Discuss with peers: Engage in conversations with fellow learners about demographic changes. Use the key vocabulary and phrases to improve English pronunciation and reinforce your learning through dialogue.

By applying these techniques, you can enhance your IELTS speaking practice, improve English pronunciation, and gain confidence in discussing complex topics effectively.

Qu'est-ce que la technique du Shadowing ?

Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.

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