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CGI WEEK 4 TEST QESTIONS AND ANSWERS
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CGI WEEK 4 TEST QESTIONS AND ANSWERS
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CGI WEEK 4 TEST QESTIONS ANDANSWERS
World population amount - answer-world population reached 7 billion in 2011-12 and is
currently growing at an annual rate of 1.2%, or 77 million people per year. 108 billion
people have ever lived on earth, 6.4% of them -7 billion- are alive now.
Six countries account for half of the annual growth - answer-india, china, pakistan,
nigeria, bangladesh, and indonesia
By 2050, world population is expected to be between - answer-7.9 billion (low) and 10.9
billion (high), with the medium producing 9.3 billion
Growth of global population - answer-in the year 1000 ad, the world population was only
400 million. In 1750 ad, 750 years later, the population was 800 million. By 1927 we had
2 billion people,3 billion by 1960. Then it took only 40 years-until 2000- for the
population to double to 6 billion
Population pressure - answer-one of the major stresses on the envrionment
The biosphere operates on the following principles - answer-biological diversity, solar
energy, and cycles of renewal, each of which are affected by population growth
Human socio-sphere may interfere with biosphere. In some cases - answer-it reflects
human values based on capitalism and consumerism. Such values may lead to entropy
or degraded energy as exemplified by waste and disorder
Large populations in and of themselves may not be a bad thing. - answer-some cities in
europe, for example, have a higher population density compared to places we normally
think of as overcrowded such as india or china. But india has the top two cities in terms
of population density: mumbai and kolkata
High population could cause problems if - answer-demands on natural resources and
development increases in an unsustainable and wasteful way
The world does not have a resource problem- there is enough food just in the ocean
and plenty of clean energy sources to sustain us all - answer-the world has a problem
with distribution of its resources due to poverty, war, greed, economic policy,
transportation relying on fossil fuels and over-consumption
Currently the world population is doubling every - answer-35 years. (3 new people born
every second, 259,200 every day)
, China is most populous (1.35 billion) with india at 1.25 billion - answer-asia is the most
populated region of the world (60% of world pop.)
Africa has highest rate of population growth - answer-with population doubling every 26
years
Population growth leads to negative effects such as - answer--economic decline
-stagnation
-global poverty
-hunger
-environmental devastation
-political unrest
Decreasing death rates in poorer countries - answer-due to medical enhancements,
better nutrition, improved sanitation etc lead to population increases
High mortality balanced by a high birth rate had led to - answer-stable populations
before the rapid growth in the 18th century
Beliefs that promote large families - answer--lack of education for women in poorer
countries hamper the ability to control populations
-factors influencing fertility rate include religion, race/ethnicity, and socioeconomic
status
Times in history of great population - answer--8000 bc, neolithic revolution,
domestication of plants, animals, steady food source
-1750, industrial revolution, could transport food to compensate for local food shortages,
increased agricultural productivity through mechanization, factories could absorb
workers displaced from agriculture, improved sanitation: so death rate fell
-after ww2 improved medicine and technology kept people living longer
Demographics - answer-study of population- size, composition
Population rises at first due to change in mortality rate; - answer-with urbanization and
higher standard of living, individuals begin to voluntarily limit family size, population
eventually stabilizes. This occurred over 100 years in the industrializing west
Number of children who must be supported is the child-dependency ratio - answer-in an
agrarian society, they can be put to work. In an industrialized, urbanized setting there
may be no jobs and they need an education
Malthusian theory - answer-good supply increases arithmetically while population
increases geometrically. Malthus though population would outstrip the food supply (the
malthusian trap)
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