Human Population Size
Muhtasari
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.
Malengo
- 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.
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Human Population Size. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- 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
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Human Population Size? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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