Populations in Ecosystems

What is population size?

• Average number of individuals in a group or area.

• Number of males in a group or area.

• Number of females in a group or area.

• Total number of individuals in a group or area.

Define population density.

• Measure of the number of people living in a given area

• Measure of the number of cars in a given area

• Measure of the number of buildings in a given area

• Measure of the number of animals living in a given area

What factors can affect population growth?

• education level, income level, social status

• birth rate, death rate, immigration, emigration, availability of resources, disease, war, and government policies

• climate change, natural disasters, technological advancements

• religion, cultural beliefs, traditions

What is carrying capacity?

• The average number of individuals an environment can support

• The minimum number of individuals an environment can support

• The number of individuals an environment can support without any limitations

• Maximum number of individuals an environment can support

Name three limiting factors that can affect population size.

• Competition for resources, predation, and disease

• Climate change, migration, and birth rate

• Emigration, natural disasters, and old age

• Habitat destruction, pollution, and genetic factors

How is population size calculated?

• Measuring the total land area

• Estimating the average age of individuals

• Calculating the birth rate

• Counting the number of individuals

What is the formula for population density?

• Population + Area

• Population / Area

• Area / Population

• Population * Area

Explain exponential growth in population.

• Exponential growth in population refers to a constant number of individuals in a population over time.

• Exponential growth in population refers to a sudden decrease in the number of individuals in a population over time.

• Exponential growth in population refers to a rapid increase in the number of individuals in a population over time.

• Exponential growth in population refers to a gradual decrease in the number of individuals in a population over time.

What happens when a population exceeds its carrying capacity?

• The population size remains the same.

• The carrying capacity increases.

• The population size increases.

• The population size decreases.

Give an example of a limiting factor in an ecosystem.

• Soil pH

• Predation

• Rainfall

• Temperature