Chapter 4 Vocabulary

Question 1

Population Density

Answer 1

The number of organisms per unit area

Question 2

Dispersion

Answer 2

The pattern of spacing in a population

Question 3

Density-independent factor

Answer 3

Any factor in the environment that does not depend on the number of members in a population per unit area

Question 4

Density-dependent factor

Answer 4

Any factor in the environment that depends on the number of members in a population per unit area

Question 5

Population growth rate (PGR)

Answer 5

Explains how fast a given population grows

Question 6

Emigration

Answer 6

The number of individuals moving away from a population

Question 7

Immigration

Answer 7

The number of individuals moving into a population

Question 8

Carrying capacity

Answer 8

The maximum number of individuals in a species that an environment can support for the long term

Question 9

Demography

Answer 9

The study of human population size, density, distribution, movement, birth and death rates

Question 10

Demographic Transition

Answer 10

Change in a population from high birth and death rates to low birth and death rates

Question 11

Zero Population Growth

Answer 11

When births plus immigration equals deaths plus emigration

Question 12

Age Structure

Answer 12

The number of males and females in each of three age groups:
Pre-productive stage, Reproductive stage, and post-productive stage