Population Growth Flashcards
The world population is ______ ______.
Growing rapidly.
What is the word we use to describe the growth of the world population?
Exponential rate.
What 2 things affect the population size of the world?
Birth rate.
Death rate.
Define birth rate.
The number of live babies born per thousand of the population per year.
Define death rate.
The number of deaths per thousand of the population per year.
What happens when the birth rate is higher than the death rate?
More people are being born than are dying.
Population grow’s.
When the birth rate is higher than the death rate, what is it called?
Natural increase.
When death rate is higher than the birth rate, what is it called?
Natural decrease.
The population size is also affected by what other factor?
Migration.
What is migration?
The movement of people from one area to another area.
Countries go through how many stages of population growth?
5 stages.
Countries going through different stages of growth is shown by what?
The Demographic Transition Model.
DTM
What happens to the birth rate and death rate in stage 1
High and fluctuating.
What happens to the population growth rate in stage 1?
Its zero.
What happens to the population size in stage 1?
Low and steady.
What happens to the birth rate in stage 2?
High and steady.
What happens to the death rate in stage 2?
Rapidly falling.
What happens to the population growth rate in stage 2?
Its very high.
What happens to the population size in stage 2?
Rapidly increasing.
Who is in the earlier stages of the DTM model?
Poorer.
Less developed countries.
Who is in the later stages of the DTM model?
Richer.
More developed countries.
What does exponential rate mean in terms of the population?
The population increases by more each year.
This is because the birth rate is greater than the death
Definition of exponential rate?
Increase in size at a constantly growing rate.
Compound interest is an example of exponential growth.
