Environmental Science and Human Populations

1. According to your text, the current population of the Earth is about _______.

A. 12 million

B. 34 million

C. 66 million

D. 1.2 billion

E. 6.6 billion

Congratulations, your answer is correct!

2. How rapidly a population's abundance changes over time depends on its:

A. demography

B. longevity

C. maximum lifetime

D. growth rates

E. age structure

Congratulations, your answer is correct!

3. In terms of a population, "age structure" refers to:

A. its system for caring for its elderly

B. the rate of population growth

C. the age at which people marry and begin to have children

D. per capita production of goods and services by age

E. the proportion of the population in different age groups

Congratulations, your answer is correct!

4. The genetically determined maximum possible age to which an individual of a species can live is termed:

A. longevity

B. maximum lifetime

C. life expectancy

D. crude growth rate

E. growth rate

Congratulations, your answer is correct!

5. The crude growth rate is defined as:

A. birth rate minus death rate

B. maximum life time minus average life expectancy

C. immigration rate minus emigration rate

D. birth rate plus death rate

E. maximum growth rate that can be accommodated

Congratulations, your answer is correct!

6. During which of the following stages of human population growth did the average rate of growth actually show a decline?

A. Stage 1: Hunters and Gatherers

B. Stage 2: Early, Preindustrial Agriculture

C. Stage 3: The Machine Age

D. Stage 4: The Modern Era

E. both Stage 1 and Stage 3

Congratulations, your answer is correct!

7. The maximum population that can be sustained indefinitely by the environment is called:

A. inflection point

B. carrying capacity

C. logistic capacity

D. demographic transition

E. maximum capacity

Congratulations, your answer...