Unit 6: Human Popultations

4 5 1 2

Every second, on average, __ or __ children are

born, somewhere on the earth. In that same second,

__ or__other people die.

ecological footprint

is a single number which estimates the relative amount of productive land required to support each of us

tripled

Over the course of the 20th century, the global population has

1.08

Currently, the global population is growing at an annual rate of __ %. 

Thomas Malthus

In 1798, ____ hypothesized that human

populations would outstrip their food supply and

collapse into starvation, crime, and misery

Karl Marx

_____ presented a view that population growth resulted from

poverty, resource depletion, pollution, and other

social ills

8.1 billion

global population in 2025

33 years

population doubling time in 1965

155 years

population doubling time in 2050

2.4

global average fertility rate

2.1

replacement fertility rate

1.9

Fertility rate in the US

1.6

Fertility rate in China

9.5 ha

Ecological footprint in the US, per person

2.2 ha

footprint in Thailand

70/growthrate%

Doubling time =

Thomas Malthus

in 1798 published An Essay on the Principle of Population

demography

encompasses vital statistics about

people, such as births, deaths, and where they live,

as well as total population size.

rising

Life expectancy is ____ worldwide.

total fertility rate

the number of children

born to an average woman in a population

during her entire reproductive life

zero population growth

occurs when births plus

immigration in a population just

equal deaths plus emigration

life span

is the oldest age to which a species is known to

survive

life expectancy

is the average age that a newborn infant can

expect to attain in any given society.

age class histograms

can show differences between

different ages of people in a population and illustrate

the social implications of population growth

dependency ratio

the number of nonworking

compared with working individuals in a population

Sub-Saharan Africa

Which geographic region has the highest fertility rates?

AIDS

What is the number one cause of mortality for adolescents in Africa?

Nigeria

What is the most populous African nation? 

Brazil

Which South American country has the largest population?

5,000

Annual income and life expectancy are strongly correlated up to about  __  U.S. dollars.

population momentum

Continued population growth despite falling birth rates

demographic trap

Rapidly growing populations may fall into a _____, a situation in which growth exceeds the sustainable yield of local forests, grazing lands, farmlands, or water resources.

fecundity

the physical ability to reproduce

fertility

is the actual production of offspring

crude birth rate

the number of births in a year per thousand persons.

ecologicla footprint analyisis

estimating the amount of territory needed to support all our consumption of food, paper, computers, energy, water, and other resources.

crude death/mortality rates

are expressed in terms of the number of deaths per thousand persons in any given year.