1. Chapter 5 Section 1 How Populations Grow
List the characteristics used to describe a population
Identify factors that affect population size
Differentiate between exponential and logistic growth

2. Introduction 5-1 Activity December 2, 2013
Write these questions and your answers on a sheet of paper.
How many people are in this classroom? (include me because I am a person)
What is the room’s area? (there are inches per meter)(area is length x width)
How many people are there in the room per square meter? (divide the number of people by the room’s area)
Population density = # of individuals/unit area
Suppose there are 150 bullfrogs living in a pond that covers an area of 3 square kilometers. What is the density of the bullfrog population?

3. List the characteristics used to describe a population.
Three important characteristics of a population are its geographic distribution, density, growth rate, and population age structure.
Density – the number of individuals per unit area. This can vary greatly depending on the species and its ecosystem.
Geographic distribution – also called the range, the area inhabited by a population. This can vary greatly.

4. List the characteristics used to describe a population - continued
Growth rate – the rate at which the size of a population changes
Population age structure – the age distribution of the individuals in that population

5. Population growth – Three factors can affect population size:
The number of births (if you have more births than deaths the population size grows)
The number of deaths (if you have more deaths than births the population size shrinks)
The number of individuals that enter or leave a population
Immigration is the movement of individuals into an area
Emigration is the movement of individuals out of an area

6. Differentiate between exponential and logistic growth.
Exponential Growth
This occurs when a population slows or stops following a period of exponential growth
As resources become less available, the growth of a population slows or stops.
This ususally appears as a “S-shaped” curve on a line graph.
This occurs when a population grows at a constant rate
Under ideal conditions with unlimited resources, a population will grow exponentially.
This usually appears as a “J-shaped” curve on a line graph.

7. Post Notes Assignment
Write questions numbered 1-6 on page 123 and answer them.
Then write the definitions for the vocabulary terms found only in section 1
population density
immigration
emigration
exponential growth
logistic growth
carrying capacity