Name: _____________________________________
Period: ___________
Populations: Human Population Growth
Historical Overview

Like the populations of many other living organisms, _____________________
___________________________________________________.

For most of human existence, __________________________________________.

________________________________ kept population sizes low.

About _______________________, the human population began growing more rapidly.

Life was made easier and safer by advances in _________________________.

Death rates were dramatically reduced due to _________________________
_______________________________________________________________________.
With these advances, the human population experienced
exponential growth.
Human Population Growth
Patterns of Population Growth

The scientific study of human populations is called ______________________.

Prentice Hall
Demography examinesCopyright
thePearson
characteristics
of human populations and attempts to
___________________________________________________________.

_______________________________________________________________________ help predict
why some countries have high growth rates while other countries grow more slowly.
The Demographic Transition

Over the past century, population growth in the United States, Japan, and much of
Europe has __________________________.

According to demographers, these countries have completed
the_______________________________, a dramatic change in birth and death rates.

The demographic transition has _______________________.
o In stage 1, ______________________________________________________.
o In stage 2, ______________________________________________________.
_______________________________________.
o In stage 3, _______________________________________________________
_______________________.
Patterns of Population Growth
The
demographic
transition is
complete when
the birthrate
falls to meet the
death rate, and
population
Age
Structure
growth
stops.

Population growth depends, in part, ________________________________
_________________________________________.

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Demographers can predict future growth using models called _________
_____________________.

Age-structure diagrams show the population of a country broken down by
________________________________________.
U.S. Population
In the United
States, there are
nearly equal
numbers of people
in each age group.
This age structure
diagram predicts a
slow but steady
growth rate for the
80+
60–64
Age (years)
40–44
20–24
0–4
Rwandan Population
In Rwanda, there
are many more
young children
than teenagers,
and many more
teenagers than
adults.
80+
Males
Females
60–64
Age (years)
40–44
20–24
This age structure
diagram predicts a
0–4
population that will
Future Population Growth
Percentage of Population
double in about 30
years.
 To predict human population growth, demographers must consider the
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_______________________________________________________________________
double in about 30
______________________________________.
years.

If growing countries move toward the demographic transition, ___________
___________________________________.

Ecologists suggest that if growth does not slow down, there could be
___________________________________________________________________.

Economists assert that ______________________________________________ may control the
Copyright
Pearson Prentice Hall growth.
negative impact of
population
Survivorship

A survivorship curve is a graph showing _______________________________
_________________________________________________ (e.g. males/females).

Survivorship curves can be constructed for a given ______________(a group of
individuals of roughly the same age) based on a life table

Survivorship curves tell us something about ______________________________
___________________. There are basically three types of survivorship curves:
Type I survivorship curves are for species that have a high survival rate of the young, live out
most of their expected life span and die in old age.
Examples: _____________________
Type II survivorship curves are for species that have a __________________________
______________________________________________. Death could be due to hunting or diseases.
Examples : coral, squirrels, honey bees, birds, and many reptiles.
Type III survivorship curves are found in species that ___________________________
______________________________________________.
Examples: Plants, oysters and sea urchins