HUMAN - Population Flashcards
What is population density?
The number of people per square km (average)
What are the problems that will occur with a rapidly rising population?
- Resources will run out
- Improved and increasing medical care
- Run out of housing
- Increaed pollution
- Disease will spread quickly
- Not enough food
- Effect the economy
What is the calculation for measuring population density?
Total population
Total land area in km²
What does working out the population density show?
Whether an area is densley or sparsley populated
Factors affecting population density: Factors encouraging settlement?
- Climate
- Job oppourtunities
- Rural/Urban reference
- Good education systems
- Fertile soil
- Flat terrain
- Good supplies of natural resources
Factors affecting population density: Factors discouraging settlement
- Bad terrain
- Pollution
- Social problems
- Cost of living
- Noise
- Unattractive scenery
- Customs & culture
- Lack of resources
- Extreme climated
Factors affecting population density: anagram?
SEEP
Social, Environmental, Economical and Political
What are the changes in population influenced by?
Birth rate, death rate and migration into or out of the area
What is birth rate?
The number of babies born per 1,000 people per year
What is the death rate?
The number of deaths per 1,000 people per year
What is migration?
Movement of people between countries
What is immigration?
The number of people entering a country
What is emmigration?
The number of people leaving a country
How has the worlds population grown? And what does this mean?
Exponentially
This means that the rate of growth has become increasingly rapid
Not only is the population increasing but the rte of increase is becoming greater
What is zero growth?
A population inbalance, BR is equal to DR so there is no increase or decrease
What is a natural increase in population?
When the BR exceeds the DR (more babies born that people dying)
What is a natural decrease in population?
When the DR exceeds the BR (more deaths than babies born)
What is natural change?
The difference between the BR and DR - expressed as a percentage
What is life expectancy?
The number of years a person is expected to live, usually taken from birth
How is population growth usually shown?
As a line graph
Why do countries nowadays have a lower birth rate?
- Better health care
- More supplies
- Having many people under the ages of 15 reduces the chance of death
- DR in countries at further stages of development is slightly higher because the population is older
What is a better indicator of development?
birth rate
Factors affecting birth rate?
- Jobs and wages
- Religion
- High infant mortality
- Education
- Stable family
- Marriage age
- Abortion
- Whether people have a house or not
- Government policy eg China
- Avaliability of contraception
- Tradiction and culture
- Medical care avaliable
Factors affecting death rate?
- Natural disasters
- Illness/disease
- Cost of living
- Medical care
- Genocide
- Lifestyle
- Life expectancy
- Supplies
- Wars (etc)
- Climate