environmental science

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Author:
micalias
ID:
9321
Filename:
environmental science
Updated:
2010-03-06 14:29:58
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test 2
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ch.6
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  1. Roughly how many people are living on the planet today?
    6.7 Billion (6,700,000,000)
  2. The impact that a group of people or a country has on the planet can be broken down into three components: the number of people (population) and
    their affluence and technology
  3. over the last 500 years, the human population has been
    undergoing exponential growth
  4. the total fertillity rate (TFR) of a population tells us
    the average number of children each female in that population has over her lifetime.
  5. Using the concept of the demographic transition, what has caused the rapid population growth seen in many developing (nonindustrialized) countries?
    Increases in food production and medical technology have cut the death rate.
  6. What percentage of the next 1 billion people added to the worldwide population will be in the developing (nonindustrialized) world?
    99%
  7. Which statement about the planet's carring capacity for humans is true?
    Technology has caused the carring capacity to jump a number of times throughout human history.
  8. Which of the following statements is an accurate description of the three principal effects of a human population on the environment (the IPAT model)?
    population, affluence, time
  9. What factors determine whether a population of humans grows,shrinks, or remains stable?
    rates of birth, death, immigration, and emigration
  10. According to the demographic transition model of populations over time,
    rapid population growth is a short-term phenomenon between the drop in birth rate in a population.
  11. Which statement is a correct description of a TFR of 2.1?
    The value means that a male and a female will be replaced by two children plus a fraction to compensate for the death of offspring.
  12. Modify: Which of the following effects on population accompanies the industrial stage of the demographis transition?
    Population growth slows.
  13. Which of the following factors would NOT increased the total fertility rate?
    improved education
  14. What are the four stages of the demographic transition?
    stable preindustrial stage, transitional stage, industrial stage, stable postindustrial stage
  15. Studies have shown that family-planning programs
    have been very effective at lowering the TFR and population growth rates.
  16. Which of these is a proper pairing of a characteristic and population growth?
    Countries with low per capita income (poor countries) typically have high population growth rates.
  17. Which statement about the growth of the human population is true?
    The rate at which the population has been growing has slowed in the past 50 years, but the human population is still getting larger.
  18. The concept of the demographic transition is used to explain why
    Industrialized countries have slowed or stopped their population growth, but nonindustrialized countries' populations are growing quickly.
  19. Which of these factors does NOT lead to population growth?
    Switch to mechanical technologies for agriculture
  20. How has the ecological footprint of the human population changed since 1960?
    We have overshot the calculated carrying capacity by 25%.

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