Populations Chapter 5

Characteristics of Populations Vocabulary Population density There are several terms that can be used to describe a population in nature. Geographic distribution It describes the area inhabited by the population. Population Density It is the number of individuals per unit area 534 trees/Km2 Growth rate How fast a population grows Population’s age structure It looks at the average age of the population.

Which Population is more Dense?

Population’s age structure Figure 5-13 Age Distribution Population’s age structure Section 5-3 U.S. Population Rwandan Population Males Females Males Females Go to Section:

Population Growth Vocabulary Immigration Emigration Three factors can affect the population size: Number of births Number of deaths Number of individuals that enter or leave the population Immigration is the movement of individuals into a population. It increases the population. Emigration is the movement of individuals out of a population. It decreases the population