Human Population Size
Gbogbo ọrọ náà
It took the whole of human history until around 1800 for the world to reach its first billion people. The eighth billion arrived in late 2022, just twelve years after the seventh. Every day the planet gains roughly 200 000 more people than it loses. Understanding why the human population changes so fast, and what that growth does to cities, resources and the environment, is one of the central questions in environmental management.
In this lesson you will learn the four levers that change a population: birth rate, death rate, immigration and emigration. You will calculate natural increase, follow a country through the demographic transition, and weigh the push and pull factors that drive people from the countryside into ever-larger cities. Then you will trace the real consequences of rapid growth, from informal settlements and megacities to pressure on water, energy, land and clean air.
Ebumnobi
- 7.2.1 Describe and explain the factors that affect changes in human populations, limited to: (a) birth rates: children per woman (b) death rates: life expectancy (c) migration: emigration, immigration and push and pull factors (d) rural and urban migration (e) urbanisation.
- 7.2.2 Describe the impacts of human population growth, limited to: (a) informal urban settlements (b) megacities (c) availability of resources (d) energy usage (e) sanitation (f) water supply (g) management of waste (h) availability of land (i) facilities and infrastructure (j) air, land, light, noise, visual and water pollution (k) traffic congestion (l) changes in employment opportunities.
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Human Population Size. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- The rate of natural increase of a population is calculated as: A. Birth rate plus death rate B. Birth rate minus death rate C. Birth rate plus migration D. Death rate minus birth rate Answer: B
- A country has a birth rate of 24 per 1000 and a death rate of 9 per 1000. Its rate of natural increase is: A. 1.5% per year B. 2.4% per year C. 0.9% per year D. 3.3% per year Answer: A
- The movement of people out of an area is called: A. Immigration B. Emigration C. Urbanisation D. Natural increase Answer: B
- Which of the following is a pull factor that attracts people to cities? A. Drought and famine B. Poverty C. Better-paid jobs D. Poor services Answer: C
- In which stage of the demographic transition model is the death rate falling rapidly while the birth rate stays high? A. Stage 1 B. Stage 2 C. Stage 4 D. Stage 5 Answer: B
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Human Population Size? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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