Chapter 5 populations
1 / 17

Chapter 5 Populations - PowerPoint PPT Presentation

  • Updated On :

Chapter 5 Populations. 5-1 How Populations Grow. KWL. What are three things you want to know about population growth? What do you know about population growth?. How Populations Grow. Characteristics of Populations Three important characteristics of a population geographic distribution

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'Chapter 5 Populations' - Anita

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Chapter 5 populations l.jpg

Chapter 5Populations


How Populations Grow

Slide2 l.jpg

  • What are three things you want to know about population growth?

  • What do you know about population growth?

How populations grow l.jpg
How Populations Grow

  • Characteristics of Populations

    • Three important characteristics of a population

      • geographic distribution

      • Density

      • growth rate

Geographic distribution l.jpg
Geographic Distribution

Geographic Distribution

  • Geographic distribution, or range, is a term that describes the area inhabited by a population.

Population density l.jpg
Population Density

  • Population density is the number of individuals per unit area.

  • The population of saguaro cactus in the desert plant community has a low density, whereas other plants in that community have a relatively high density.

Populations growth l.jpg
Populations Growth

  • Population Growth

  • Three factors can affect population size:

    • number of births

    • the number of deaths

    • the number of individuals that enter or leave the population.

      * Simply put, a population will increase or decrease in size depending on how many individuals are added to it or removed from it

Immigration emmigration l.jpg
Immigration & Emmigration

  • Immigration

    • the movement of individuals into an area, is another factor that can cause a population to grow.

  • Emigration

    • the movement of individuals out of an area, can cause a population to decrease in size.

Word origin l.jpg
Word Origin

  • Immigration is formed from the Latin prefix in-, meaning “in,” and migrare, meaning “to move from one place to another.

  • If the Latin prefix e- means “out,” then which of the following means “migration out”?

    • A.) emigration

    • B.) migration

    • C.) Immigration

Exponetial growth l.jpg
Exponetial Growth

  • Exponential Growth

    • If a population has abundant space and food, and is protected from predators and disease, then organisms in that population will multiply and the population size will increase.

Exponential growth l.jpg
Exponential Growth

Exponential growth occurs when the individuals in a population reproduce at a constant rate.

Under ideal conditions with unlimited resources, a population will grow exponentially.

Checkpoint l.jpg

Which of the following is NOT a condition for a population to reach exponential growth?

A.) presence of unlimited resources

B.) Absence of predation and disease

C.) movement of individuals out of the population

Logistic growth l.jpg
Logistic Growth

  • Logistic growth occurs when a population's growth slows or stops following a period of exponential growth.

  • As resources become less available, the growth of a population slows or stops. The general, S-shaped curve of this growth pattern, called logistic growth

Carrying capacity l.jpg
Carrying Capacity

  • Carrying Capacity 

    The number or the largest number of individuals that a given environment can support.

Slide16 l.jpg

List three characteristics that are used to describe a population.

What factors can change a population's size?

What is the difference between exponential growth and logistic growth?

Slide17 l.jpg

  • Using Graphic Organizers population.

  • Draw a concept map that shows how populations grow. Include the following terms: exponential growth, logistic growth, birthrate, death rate, immigration, emigration. Add any other terms that you think are useful to complete the map