click below
click below
Normal Size Small Size show me how
Chapter 3 Section 1
Term | Definition |
---|---|
Population | The total number of people in an area |
Population Distribution | The way the population is spread out over an area |
Demography | The science that studies population distribution and change |
Population Density | The average number of people per square mile or square kilometer |
Birthrate | The number of live births each year per 1,000 people |
Death rate | The number of deaths each year per 1,000 people |
“Formula” for Population Density | population divided by size of area |
Why has population increased rapidly since 1800? | Examples: Better farming and greater food supply; more clean water; better medicine and healthcare |
What are some challenges of population growth? | Examples: Not enough fresh water or food; not enough jobs; not enough schools; negative effects on the environment (pollution, destroyed forests) |
If the birthrate is greater than death rate, population will... | Increase |
If the death rate is greater than the birth rate, population will... | Decrease |
In the past (before 1800), most people lived... | On farms where they could grow their own food. |