Populations

the number of births per 1,000 individuals for a certain time period.

• birth rate

• death rate

• immigration

• emigration

the number of deaths per 1,000 individuals for a certain time period.

• birth rate

• death rate

• immigration

• emigration

movement of individuals into a population's area

• birth rate

• death rate

• immigration

• emigration

movement of individuals out of a population's area

• birth rate

• death rate

• immigration

• emigration

the number of individuals in an area of a specific size.

• limiting factor

• population density

• carrying capactiy

• emigration

an environmental factor that causes a population to decrease in size.

• limiting factor

• population density

• carrying capactiy

• emigration

the largest population that a particular environment can support.

• limiting factor

• population density

• carrying capactiy

• emigration

What might happen if the earth exceeds its carrying capacity?

• There might not be room for people to move around.

• There might not be enough food and water for everyone.

• The continents might sink into the oceans.

• Most of the people on the planet would starve.

Which of the following describes a population?

• The total number of people, animals, and plants in New York City

• The total number of houses in Atlanta

• The total number of people living in the state of Texas

• The total number of fish in all the world's oceans

If the world population keeps growing at its current rate, how many people might be alive in 10 years?

• 14 million

• 22 billion

• Between 7 and 8 billion

• 1.5 trillion