Population

One reason the world is growing so quickly is because...

• The world has infinite resources for everyone

• Birth rate is higher than death rate

• There are more and more places for people to live

• Death rate is higher than birth rate

The average number of people per square mile is...

• Birth rate

• Land area

• Population density

• too many

People leaving a country is called

• Immigration

• Emigration

• Mass migration

• Urbanization

 When an environment has reached its carrying capacity for a certain population, which of the following is true? 

•  Growth and immigration rate is equal to death and emigration rate. 
•  Growth and immigration rate is greater than death and emigration rate. 
• Growth and immigration rate is less than death and emigration rate. 
• Growth rate is exponential. 

Angel was trying to explain carrying capacity to her mother.  Which of the following descriptions is accurate? Carrying capacity is :

• the maximum number of individuals that an ecosystem can sustain. 
•  the ability of an environment to accommodate a growing population. 
• the greatest number of individuals that an area can sustain over the long term. 
• the maximum number of species that can co-exist in an area. 

An animal population decreases from 800 individuals to 600 individuals. Which of the following could explain this change in population size? 

•  The population size of the animal’s predator increased. 
•  The emigration rate of the animals from the population decreased. 
• The number of breeding pairs in the animal’s population increased. 
• The number of species competing with the animal for food decreased.  

 On remote islands, immigration and emigration usually do not have a large effect on population sizes. A bird population on a remote island remains at a relatively constant size year after year. Which of the following most likely describes the birthrate and the death rate for this population? 

•  Birthrate and death rate are both zero 
•  Birthrate and death rate are close to equal. 
• Birthrate is significantly less than death rate. 
• Birthrate is significantly greater than death rate. 

At what population was carrying capacity met?

• 250

• 1000

• 400

• 720

Logistic population growth can be described as

• growth when resources are limited

• a s-shaped curve

• reaching carrying capacity

• all of the above

Which country will have the most rapid population growth?

• Sweeden

• United States

• Mexico

• None