Population
_______________ is a term for the number of people who live in a certain amount of space.
Population density
A __________________ is a group of people with unique and special culture.
civilization
The continent of Antartica has a population density of ________, because people cannot survive there for very long.
zero
When we say ______________, we mean food, clothing, beliefs, customs, housing, and sports.
culture
All living things, including humans must _________ to their environment in order to survive.
adapt
A ______________ is a large, naturally flowing body of water.
river
When a city gets crowded with too many people, there aren't enough ____________ for everyone to be comfortable.
resources
The Nile river is located in ______________.
Egypt
Animals and plants are becoming _________________ due to the many houses and businesses being built in the desert
endangered
Another word for an aqueduct is __________________.
a huge ditch