Population Basics
What is a population?
All members of a species living in a given area
What increases a population?
Births and people moving in
What are the 3 age groups?
Pre-reproductive, reproductive, post-reproductive
What is a natural resource?
Something from Earth used by living things
What does “abundant” mean?
A lot / easy to get
What caused human population to grow faster in the 1800s?
Better healthcare, cleaner water, and technology
What decreases a population?
Deaths and people moving out
What shape shows rapid population growth?
Triangle
What do humans need to survive?
Food, water, shelter
What does “technological advances” mean?
Improvements in technology
What is a population explosion?
A sudden increase in population
Is population growth equal around the world?
No
What shape shows slow growth?
Rectangle with a bulge
What is carrying capacity?
Max population Earth can support
What does “environment” mean?
Surroundings where organisms live
What is urbanization?
Development of land for houses and buildings
Which countries grow faster: developed or developing?
Developing countries
What shape shows no growth?
Rectangle
What happens if resources become scarce?
Population may decrease
What does “determine” mean?
To decide
Why did suburbs grow in the U.S.?
People moved out of crowded cities
Why do developing countries grow faster?
More people in reproductive ages
What does age structure tell us?
How a population may grow
Who uses more resources—developed or developing countries?
Developed countries
What does “relatively” mean?
Compared to something else