Ans. People usually avoid extreme climates that are very hot or very cold like Sahara desert, polar regions of Russia, Canada and Antarctica.
Ans. In countries like Japan, low birth rates make the pyramid narrow at the base. Decreased death rates allow numbers of people to reach old age.Image from NCERT
Ans. The main reason for this growth was that with better food supplies and medicine, deaths were reducing, while the number of births still remained fairly high.
Ans. Human resources like other resources are not equally distributed over the world. They differ in their educational levels, age and sex. Their numbers and characteristics also keep changing.
Ans. The general trend of international migrations is from the less developed nations to the more developed nations in search of better employment opportunities.
Ans. Nature’s bounty becomes significant only when people find it useful. It is people with their demands and abilities that turn them into ‘resources’. Hence, human resource is the ultimate resource.
Ans. A population pyramid, also called an "age-sex pyramid", is a graphical illustration that shows the distribution of various age groups in a population, which forms the shape of a pyramid when the population is growing.
Ans. How crowded a country is, has little to do with its level of economic development. For example, both Bangladesh and Japan are very densely populated but Japan is far more economically developed than Bangladesh.
Ans. The major factors affecting population are birth, death and migration. Birth rate is the number of live births per 1,000 people. Death rate is the number of deaths per 1,000 people. Migration is the movement of people in and out of an area.
Ans. Some countries like Kenya have high population growth rates. They had both high birth rates and death rates. Now, with improving health care, death rates have fallen, but birth rates still remain high leading to high growth rates.
Ans. When people are attracted to an area it becomes densely populated. Factors that influence this include favourable climate; good supplies of natural resources and fertile land.
Ans. Population composition refers to the structure of the population.
The composition of population helps us to know how many are males or females, which age group they belong to, how educated they are and what type of occupations they are employed in, what their income levels and health conditions are.
Ans. In 1820, the world’s population reached one billion. A hundred and fifty years later, in the early 1970s, the world’s population reached 3 billion. This is often called population explosion. In 1999, less than 30 years later, the population doubled to 6 billion. The main reason for this growth was that with better food supplies and medicine, deaths were reducing, while the number of births still remained fairly high.
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