Download Human Population - Growth & Age Structure Notes

Human Population – Growth & Age Structure (4.2)
State Standard
SB4A. Investigate the relationships among
organisms, populations, communities,
ecosystems, and biomes.
SB4D. Assess and explain human activities that
influence and modify the environment such as
global warming, population growth, pesticide
use, and water and power consumption.
Chapter 4
Population Ecology
4.2 Human Population
Human Population
Growth Rate
 The human population experienced
____________ growth as humans benefitted from
the Industrial ____________, improved
____________ production, improved
____________ care, & disease cure/prevention
Chapter 4
Population Ecology
4.2 Human Population
Human Population
Growth Rate Cont’d
 Although the
human population
is still growing, the
rate of its growth
has ___________.
 Diseases like
______ & also
____________
population control
have contributed to
this slowing.
Chapter 4
Population Ecology
4.2 Human Population
Trends in Human Population Growth
 Population
trends can
be altered by
events such
as
__________
and
________.
 Human
population
growth is ________ the same in all countries.
Chapter 4
Population Ecology
4.2 Human Population
Trends in Human Population Growth Cont’d
 ____________ ___________
____________ (ZPG) occurs when the
birthrate equals the death rate.
 The age structure eventually should be more
balanced with numbers at ______reproductive, ____________, and ______reproductive ages being approximately
equal.
Chapter 4
Population Ecology
4.2 Human Population
Trends in Human Population Growth Cont’d
Age Structure
 A population’s
_____
__________ is
the number of
males and
females in each
of ______ age
groups:
pre-reproductive stage, reproductive stage, and postreproductive stage.
Chapter 4
Population Ecology
4.2 Human Population
Trends in Human Population Growth Cont’d
Human Carrying Capacity
 Scientists are
concerned about the
human population
reaching or _________
the carrying capacity.
 An important factor is the
amount of ___________
from the biosphere that
are used by each person.